7th Class Science Forests: Our Lifeline Question Bank

done Forests : Our Lifeline Total Questions - 104

• question_answer1)
  The branchy part of a tree above the stem is called:-
  A)
  canopy             done clear
  B)
  hub done clear
  C)
  crown          done clear
  D)
  shrub done clear
  View Solution play_arrow

• question_answer2)
  Find the missing link Grass\[\to \]insect\[\to \]frog\[\to \]______\[\to \]eagle
  A)
  snake            done clear
  B)
  peacock done clear
  C)
  crow               done clear
  D)
  lion done clear
  View Solution play_arrow

• question_answer3)
  A forest consists of
  A)
  animals                        done clear
  B)
  plants done clear
  C)
  floor converted with dead and decaying matter done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer4)
  Microorganisms produce ________ by acting upon the dead plants.
  A)
  wood                           done clear
  B)
  humus done clear
  C)
  mushrooms                  done clear
  D)
  sand done clear
  View Solution play_arrow

• question_answer5)
  Identify the wrong statement.
  A)
  soil helps forests to grow and regenerate done clear
  B)
  forests influence climatic and water cycle. done clear
  C)
  forest protect the soil from erosion done clear
  D)
  plants and animals in a forest are not dependent on each other. done clear
  View Solution play_arrow

• question_answer6)
  Forests are also called
  A)
  green lungs       done clear
  B)
  red kidney done clear
  C)
  brown heart        done clear
  D)
  black skin done clear
  View Solution play_arrow

• question_answer7)
  Floods can be controlled by
  A)
  constructing pits           done clear
  B)
  forests done clear
  C)
  constructing temporary shelters done clear
  D)
  By allowing water to flow into sea. done clear
  View Solution play_arrow

• question_answer8)
  Mushrooms eat ______
  A)
  rice                              done clear
  B)
  wax done clear
  C)
  humus       done clear
  D)
  wheat done clear
  View Solution play_arrow

• question_answer9)
  Which of the following is not a forest product?
  A)
  Gum               done clear
  B)
  sealing wax done clear
  C)
  play wood                    done clear
  D)
  kerosene done clear
  View Solution play_arrow

• question_answer10)
  If forests disappear
  A)
  Amount of \[C{{O}_{2}}\]in air will decrease done clear
  B)
  Amount of \[C{{O}_{2}}\] in air will increase done clear
  C)
  Amount of \[{{O}_{2}}\]in air will increase done clear
  D)
  Amount of \[{{N}_{2}}\] in air will increase done clear
  View Solution play_arrow

• question_answer11)
  Disappearance of forests will lead to increase in amount of carbon dioxide in air. It is likely to result in
  A)
  Eutrophication             done clear
  B)
  Global warming done clear
  C)
  Deforestation               done clear
  D)
  Afforestation done clear
  View Solution play_arrow

• question_answer12)
  Which of the following is incorrect?
  A)
  The tropical rain forests support a wide variety of plants and animals. done clear
  B)
  We find animals such as ape, bird Toucan, red eyed frogs etc. in the regions of tropical rain forests. done clear
  C)
  The temperature range in the areas of tropical rain forests is\[15-40{}^\circ C.\] done clear
  D)
  None of the above is incorrect. done clear
  View Solution play_arrow

• question_answer13)
  Select the chain that contains primary consumers.
  A)
  Bird, rabbit, elephant done clear
  B)
  Grass, parrot, snake done clear
  C)
  Snake, hawk, tiger done clear
  D)
  Bacteria, fungi, viruses done clear
  View Solution play_arrow

• question_answer14)
  Select the one that is not a forest product.
  A)
  gum                             done clear
  B)
  plywood done clear
  C)
  sealing wax                  done clear
  D)
  kerosene done clear
  View Solution play_arrow

• question_answer15)
  Micro-organisms act upon dead plants to produce
  A)
  sand                             done clear
  B)
  mushrooms done clear
  C)
  humus              done clear
  D)
  wood done clear
  View Solution play_arrow

• question_answer16)
  An animal which feeds on dead organisms is a
  A)
  scavenger done clear
  B)
  first level carnivore done clear
  C)
  second level carnivore done clear
  D)
  parasite done clear
  View Solution play_arrow

• question_answer17)
  Some herbs and plants that were used in ancient times for making drugs and are even now used for the same purpose. Which of the following is not one of these?
  A)
  Marigold done clear
  B)
  Foxglove done clear
  C)
  Belladona done clear
  D)
  The plant of castor oil. done clear
  View Solution play_arrow

• question_answer18)
  A tree species in Mauritius failed to reproduce because of extinction of a fruit eating bird. The bird was
  A)
  Condor                        done clear
  B)
  Dodo done clear
  C)
  Dove                            done clear
  D)
  Skua done clear
  View Solution play_arrow

• question_answer19)
  Select the country that is the largest producer of fuel wood in the world.
  A)
  India             done clear
  B)
  China done clear
  C)
  Russia                          done clear
  D)
  Indonesia done clear
  View Solution play_arrow

• question_answer20)
  The cricket bats are made out of wood of which of the following?
  A)
  Sal                               done clear
  B)
  Rose wood done clear
  C)
  Teak                            done clear
  D)
  Willow done clear
  View Solution play_arrow

• question_answer21)
  The correct arrangement in the order from upper layers to lower layer in forests is
  A)
  trees, Shrubs, herbs, vegetation. done clear
  B)
  vegetation, herbs, shrubs, trees. done clear
  C)
  trees, herbs, shrubs, vegetation. done clear
  D)
  vegetation, shrubs, herbs, trees. done clear
  View Solution play_arrow

• question_answer22)
  Which of the following animals live in deeper areas of forests?
  A)
  Boar                            done clear
  B)
  Bison done clear
  C)
  Elephant         done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer23)
  Choose the correct statement.
  A)
  Trees have crowns of different sizes and different types. done clear
  B)
  Trees have crowns of same sizes and different types. done clear
  C)
  Trees have crowns of different sizes and same type. done clear
  D)
  None of the above is correct. done clear
  View Solution play_arrow

• question_answer24)
  In the forests there is interaction between.
  A)
  soil and water only done clear
  B)
  air and living organism only done clear
  C)
  soil, water, air and living organisms. done clear
  D)
  none of the above is correct done clear
  View Solution play_arrow

• question_answer25)
  Forests protect soil from
  A)
  eutrippication              done clear
  B)
  erosion done clear
  C)
  both of these                done clear
  D)
  none of these done clear
  View Solution play_arrow

• question_answer26)
  In India the area under forest cover is about ....... of the total area?
  A)
  10%                             done clear
  B)
  11% done clear
  C)
  20%                             done clear
  D)
  21% done clear
  View Solution play_arrow

• question_answer27)
  In the absence of plants/trees/forests
  A)
  Global warming will be caused. done clear
  B)
  Animals will not get food and shelter. done clear
  C)
  Floods will be caused done clear
  D)
  All the above are correct. done clear
  View Solution play_arrow

• question_answer28)
  Humus is
  A)
  a dark coloured substance done clear
  B)
  a white coloured substance done clear
  C)
  a light coloured substance done clear
  D)
  none of the above is correct done clear
  View Solution play_arrow

• question_answer29)
  The micro-organisms that convert the dead plants and animals to humus are known as
  A)
  primary consumers      done clear
  B)
  decomposers done clear
  C)
  predators        done clear
  D)
  none of these done clear
  View Solution play_arrow

• question_answer30)
  Plants release oxygen through
  A)
  transpiration                done clear
  B)
  food chain done clear
  C)
  photosynthesis             done clear
  D)
  none of these done clear
  View Solution play_arrow

• question_answer31)
  Weathering and erosion of Earth's crust are primarily caused by
  A)
  gravity              done clear
  B)
  volcanic activity done clear
  C)
  evaporation                 done clear
  D)
  sedimentation done clear
  View Solution play_arrow

• question_answer32)
  Earth's weather is primarily caused by the
  A)
  drifting of Earth's crustal plates done clear
  B)
  gravitational attraction of the Moon done clear
  C)
  uneven heating of Earth's surface done clear
  D)
  changing distance between Earth and the Sun done clear
  View Solution play_arrow

• question_answer33)
  A food chain consists of
  A)
  producers only done clear
  B)
  producers and consumers done clear
  C)
  consumers only done clear
  D)
  decomposers only done clear
  View Solution play_arrow

• question_answer34)
  In a food chain the first link is a green plant because they are
  A)
  widely distributed done clear
  B)
  fixed at one place in soil done clear
  C)
  photosynthetic done clear
  D)
  more in number done clear
  View Solution play_arrow

• question_answer35)
  Ecosystem means
  A)
  organisms reacting with one another done clear
  B)
  a community of organisms together with the environment in which they live done clear
  C)
  Abiotic components done clear
  D)
  Earth and its atmosphere done clear
  View Solution play_arrow

• question_answer36)
  Which of the following sets represents primary consumers?
  A)
  goat, rabbit, horses      done clear
  B)
  insects, snails done clear
  C)
  deer?s, giraffes, cows    done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer37)
  Ecosystem has two components. They are
  A)
  plants and animals       done clear
  B)
  living and non-living done clear
  C)
  frogs and man done clear
  D)
  trees and fungi done clear
  View Solution play_arrow

• question_answer38)
  When we destroy a forest we destroy
  A)
  Food and shelter of wild animals done clear
  B)
  an ecosystem done clear
  C)
  Plant life done clear
  D)
  population of wild life done clear
  View Solution play_arrow

• question_answer39)
  Which of the following play a very important role in causing rainfall?
  A)
  vehicles           done clear
  B)
  animals done clear
  C)
  factories                       done clear
  D)
  plants done clear
  View Solution play_arrow

• question_answer40)
  Which of the following produce food?
  A)
  Saprotroph                  done clear
  B)
  autotrophs done clear
  C)
  Heterotrophs                done clear
  D)
  Herbivores done clear
  View Solution play_arrow

• question_answer41)
  DIRECTIONS: Match column I with column II and select the correct answers using the code given below the columns.

  Column-I	Column-II
  (A) Crown of a tree	(i) Understory?s
  (B) Canopy	(ii) Branchy part of a tree above the stem.
  (C) Decomposers	(iii) Green lungs.
  (D) Forests	(iv) Mushrooms

  A)
  (A) \[\to \] (i),(B) \[\to \] (ii),(C) \[\to \] (iii),(D) \[\to \] (iv) done clear
  B)
  (A) \[\to \] (ii),(B) \[\to \] (i),(C) \[\to \] (iii),(D) \[\to \] (iv) done clear
  C)
  (A) \[\to \] (ii),(B) \[\to \] (i),(C) \[\to \] (iv),(D) \[\to \] (iii) done clear
  D)
  (A) \[\to \] (i),(B) \[\to \] (ii),(C) \[\to \] (iv),(D) \[\to \] (iii) done clear
  View Solution play_arrow

• question_answer42)
  DIRECTIONS: Match column I with column II and select the correct answers using the code given below the columns.

  Column-I	Column-II
  (A) Herbivore	(p) vulture
  (B) Omnivore	(q) deer
  (C) Decomposer	(r) Bacteria
  (D) Scavenger	(s) bear

  A)
  (A) \[\to \] (s),(B) \[\to \] (q),(C) \[\to \] (p),(D) \[\to \] (r) done clear
  B)
  (A) \[\to \] (q),(B) \[\to \] (s),(C) \[\to \] (p),(D) \[\to \] (r) done clear
  C)
  (A) \[\to \] (q),(B) \[\to \] (s),(C) \[\to \] (r),(D) \[\to \] (p) done clear
  D)
  (A) \[\to \] (r),(B) \[\to \] (p),(C) \[\to \] (s),(D) \[\to \] (q) done clear
  View Solution play_arrow

• question_answer43)
  DIRECTIONS: Match column I with column II and select the correct answers using the code given below the columns.

  Column-I	Column-II
  (A) Crown	(p) Branches of tall trees forming a roof in a forest
  (B) Understory	(q) Plants that climb another trees
  (C) canopy	(r) different horizontal layers in forests
  (D) Creepers	(s) Branchy part of tree above the stem

  A)
  (A) \[\to \] (r),(B) \[\to \] (q),(C) \[\to \] (p),(D) \[\to \] (s) done clear
  B)
  (A) \[\to \] (s),(B) \[\to \] (r),(C) \[\to \] (p),(D) \[\to \] (q) done clear
  C)
  (A) \[\to \] (q),(B) \[\to \] (p),(C) \[\to \] (s),(D) \[\to \] (r) done clear
  D)
  (A) \[\to \] (p),(B) \[\to \] (s),(C) \[\to \] (r),(D) \[\to \] (q) done clear
  View Solution play_arrow

• question_answer44)
  DIRECTIONS: Match column I with column II and select the correct answers using the code given below the columns.

  Column-I	Column-II
  (A) producer	(p) animals
  (B) consumer	(q) sun
  (C) decomposer	(r) plants
  (D) source of energy	(s) bacteria, fungi

  A)
  (A) \[\to \] (q),(B) \[\to \] (r),(C) \[\to \] (p),(D) \[\to \] (s) done clear
  B)
  (A) \[\to \] (r),(B) \[\to \] (p),(C) \[\to \] (s),(D) \[\to \] (q) done clear
  C)
  (A) \[\to \] (s),(B) \[\to \] (q),(C) \[\to \] (r),(D) \[\to \] (p) done clear
  D)
  (A) \[\to \] (p),(B) \[\to \] (s),(C) \[\to \] (q),(D) \[\to \] (r) done clear
  View Solution play_arrow

• question_answer45)
  DIRECTIONS: Read the passage (s) given below and answer the questions that follow.                              Passage - 1 Forests are a useful natural resource for us. Forests serve as green lungs and water purifying systems in nature. Forests provide shelter to many animals, birds and insects. Many animals like boar, bison, and jackal elephant live in the deeper areas of forests. And forests protect us from droughts and floods. Rajendra Singh, nicknamed the "water man" is a pioneer in the field of water conservation, his main area of activities being drought prone western Rajasthan. He was awarded a prize for his work in 2001. Which of the following awards did he receive?
  A)
  Raman Magsaysay award for community leadership done clear
  B)
  Bharat Ratna done clear
  C)
  Padma Shree done clear
  D)
  Nobel Peace prize done clear
  View Solution play_arrow

• question_answer46)
  DIRECTIONS: Read the passage (s) given below and answer the questions that follow.                              Passage - 1 Forests are a useful natural resource for us. Forests serve as green lungs and water purifying systems in nature. Forests provide shelter to many animals, birds and insects. Many animals like boar, bison, and jackal elephant live in the deeper areas of forests. And forests protect us from droughts and floods. Which of the following is a source of food and shelter for animals, birds and insects?
  A)
  Uppermost layer done clear
  B)
  Lowest layer of vegetation done clear
  C)
  Different layers of vegetation done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer47)
  DIRECTIONS: Read the passage (s) given below and answer the questions that follow.                              Passage - 1 Forests are a useful natural resource for us. Forests serve as green lungs and water purifying systems in nature. Forests provide shelter to many animals, birds and insects. Many animals like boar, bison, and jackal elephant live in the deeper areas of forests. And forests protect us from droughts and floods. Which of the following is correct for forests?
  A)
  They are a useful man made resource. done clear
  B)
  They are a useful natural resource. done clear
  C)
  Both the above are correct. done clear
  D)
  None of these is correct. done clear
  View Solution play_arrow

• question_answer48)
  DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 2 The forest floor provides favorable conditions for seed produced by trees to germinate and develop into seedlings and saplings. Some grow into trees. The branchy part of a tree above the stem is known as crown. The branches of the tall trees look like a roof over the other plants in the forest. This is called canopy All the seeds in forests develop into
  A)
  bushes             done clear
  B)
  grasses done clear
  C)
  tall trees          done clear
  D)
  none of these done clear
  View Solution play_arrow

• question_answer49)
  DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 2 The forest floor provides favorable conditions for seed produced by trees to germinate and develop into seedlings and saplings. Some grow into trees. The branchy part of a tree above the stem is known as crown. The branches of the tall trees look like a roof over the other plants in the forest. This is called canopy The branchy part of a tree above the stem is known as
  A)
  trunk                            done clear
  B)
  tusker done clear
  C)
  crown              done clear
  D)
  canopy done clear
  View Solution play_arrow

• question_answer50)
  DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 2 The forest floor provides favorable conditions for seed produced by trees to germinate and develop into seedlings and saplings. Some grow into trees. The branchy part of a tree above the stem is known as crown. The branches of the tall trees look like a roof over the other plants in the forest. This is called canopy The branches of tall trees that look like a roof over the other plants in the forest are called
  A)
  trunk                            done clear
  B)
  roof of tree done clear
  C)
  crown                          done clear
  D)
  canopy done clear
  View Solution play_arrow

• question_answer51)
  DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 3 Mushrooms and other micro-organisms that live in the soil feed upon dead plant and animal tissues and are known as decomposers. These micro-organisms play an important role in forests. The humus, a dark coloured substance, is produced by decomposers. A layer of humus is found if we remove some dead leaves from the soil in forests. The presence of humus ensures that nutrients from dead plants and animals are released into the soil. When the nutrients are recycled in forests,
  A)
  There is no wastage in forests done clear
  B)
  The nutrients are again absorbed by the roots of living plants. done clear
  C)
  Both the above are correct done clear
  D)
  None of the above is correct. done clear
  View Solution play_arrow

• question_answer52)
  DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 3 Mushrooms and other micro-organisms that live in the soil feed upon dead plant and animal tissues and are known as decomposers. These micro-organisms play an important role in forests. The humus, a dark coloured substance, is produced by decomposers. A layer of humus is found if we remove some dead leaves from the soil in forests. The presence of humus ensures that nutrients from dead plants and animals are released into the soil. Mushroom
  A)
  can be seen under a hand lens over decaying leaves done clear
  B)
  can be seen under a hand lens over the leaves of living plants done clear
  C)
  both the above are correct done clear
  D)
  none of these is correct done clear
  View Solution play_arrow

• question_answer53)
  DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 3 Mushrooms and other micro-organisms that live in the soil feed upon dead plant and animal tissues and are known as decomposers. These micro-organisms play an important role in forests. The humus, a dark coloured substance, is produced by decomposers. A layer of humus is found if we remove some dead leaves from the soil in forests. The presence of humus ensures that nutrients from dead plants and animals are released into the soil. Humus
  A)
  is a dark coloured substance. done clear
  B)
  is produced by micro-organisms. done clear
  C)
  is produced by decomposers. done clear
  D)
  all the above are correct. done clear
  View Solution play_arrow

• question_answer54)
  DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 3 Mushrooms and other micro-organisms that live in the soil feed upon dead plant and animal tissues and are known as decomposers. These micro-organisms play an important role in forests. The humus, a dark coloured substance, is produced by decomposers. A layer of humus is found if we remove some dead leaves from the soil in forests. The presence of humus ensures that nutrients from dead plants and animals are released into the soil. Temperature at place 'A' is high most of the time. Place 'A' also has a heavy rainfall on most of the days. The climate of 'A' is
  A)
  hot                               done clear
  B)
  hot and dry done clear
  C)
  hot and wet                  done clear
  D)
  none of these done clear
  View Solution play_arrow

• question_answer55)
  DIRECTIONS: The questions in this segment consists of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): A Food chain will never begin if there are no green plants. Reason (R): Green plants produce food by the process of photosynthesis.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer56)
  DIRECTIONS: The questions in this segment consists of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Deforestation destroys an ecosystem Reason (R): A forest is cleared to cultivate crops
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer57)
  DIRECTIONS: The questions in this segment consists of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Loss of top soil is called soil erosion Reason (R): Heavy rains and deforestation causes loss of soil.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer58)
  DIRECTIONS: The questions in this segment consists of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Forests do not influence the climate and water cycle. Reason (R): Forests do not bring rain
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer59)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) In an ecosystem, number of producers should be more than consumers. (ii) Number of decomposers should be large.
  A)
  Statement (i) is correct while statement (ii) is incorrect. done clear
  B)
  Statement (ii) is correct while statement (i) is incorrect. done clear
  C)
  Both statements are correct. done clear
  D)
  Both statements are incorrect. done clear
  View Solution play_arrow

• question_answer60)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) The branchy part of a tree is canopy (ii) Shrubs and short trees form a crown.
  A)
  Statement (i) is correct while statement (ii) is incorrect. done clear
  B)
  Statement (ii) is correct while statement (i) is incorrect. done clear
  C)
  Both statements are correct. done clear
  D)
  Both statements are incorrect. done clear
  View Solution play_arrow

• question_answer61)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Ecosystem means a community of organisms living together with the environments. (ii) Sun is the ultimate source of energy
  A)
  Statement (i) is correct while statement (ii) is incorrect. done clear
  B)
  Statement (ii) is correct while statement (i) is incorrect. done clear
  C)
  Both statements are correct. done clear
  D)
  Both statements are incorrect. done clear
  View Solution play_arrow

• question_answer62)
  DIRECTIONS: Carefully observe pictures given below and answer the following questions. Look at the following diagram and answer the following questions. What does the diagram represent?
  A)
  life cycle of frog            done clear
  B)
  an ecosystem done clear
  C)
  a food chain        done clear
  D)
  a population done clear
  View Solution play_arrow

• question_answer63)
  DIRECTIONS: Carefully observe pictures given below and answer the following questions. Look at the following diagram and answer the following questions. Name the producer
  A)
  grass            done clear
  B)
  frog done clear
  C)
  snake                           done clear
  D)
  grasshopper done clear
  View Solution play_arrow

• question_answer64)
  DIRECTIONS: Carefully observe pictures given below and answer the following questions. Study the given figure. What should come in the empty box?
  A)
  done clear
  B)
  done clear
  C)
                     done clear
  D)
  done clear
  View Solution play_arrow

• question_answer65)
  DIRECTIONS: Carefully observe pictures given below and answer the following questions. What could arrow 1 and 2 represent in the above diagram?
  A)
  Oxygen, nitrogen done clear
  B)
  carbon dioxide, oxygen done clear
  C)
  oxygen, carbon dioxide done clear
  D)
  energy, water done clear
  View Solution play_arrow

• question_answer66)
  Soil erosion can easily occur due to
  A)
  rain or floods   done clear
  B)
  high velocity winds done clear
  C)
  deforestation done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer67)
   A food chain will not begin in the absence of
  A)
  bacteria                       done clear
  B)
  fungi done clear
  C)
  green plants                 done clear
  D)
  animals done clear
  View Solution play_arrow

• question_answer68)
  Which of the following is a canopy?
  A)
  shrubs             done clear
  B)
  short trees done clear
  C)
  toll trees           done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer69)
  In an ecosystem, the population of
  A)
  secondary consumers is large done clear
  B)
  primary consumers is large done clear
  C)
  decomposers is large done clear
  D)
  producers is large than consumers done clear
  View Solution play_arrow

• question_answer70)
  Which of the following convert the dead plants and animals to humus?
  A)
  chemicals                     done clear
  B)
  scavengers done clear
  C)
  Decomposers     done clear
  D)
  Consumers done clear
  View Solution play_arrow

• question_answer71)
  Which of the following is called green lungs?
  A)
  green colored lungs done clear
  B)
  Lungs with green alga done clear
  C)
  Lungs in green colored animals done clear
  D)
  Forests done clear
  View Solution play_arrow

• question_answer72)
  Which of the following feed upon dead plant and animal tissues?
  A)
  Spirogyra                     done clear
  B)
  Chlorella done clear
  C)
  Mushroom       done clear
  D)
  Chlamydomonas done clear
  View Solution play_arrow

• question_answer73)
  Vultures and jackals are
  A)
  herbivores                    done clear
  B)
  Carnivores done clear
  C)
  Scavengers       done clear
  D)
  Decomposers done clear
  View Solution play_arrow

• question_answer74)
  Greenhouse effect causes
  A)
  melting of ice caps done clear
  B)
  rising of sea levels done clear
  C)
  submerging of low lying areas done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer75)
  Highest quantity of energy occurs in the
  A)
  primary producers   done clear
  B)
  herbivores done clear
  C)
  carnivores                    done clear
  D)
  decomposers done clear
  View Solution play_arrow

• question_answer76)
  Which of the following is called as dynamic living entity?
  A)
  oceans                         done clear
  B)
  forests done clear
  C)
  villages                         done clear
  D)
  cities done clear
  View Solution play_arrow

• question_answer77)
  Which of the following binds the soil together?
  A)
  Rocks               done clear
  B)
  Trees done clear
  C)
  Layers of soil               done clear
  D)
  Water done clear
  View Solution play_arrow

• question_answer78)
  Forests help
  A)
  to prevent diseases       done clear
  B)
  to prevent rainfall done clear
  C)
  to prevent floods          done clear
  D)
  in soil erosion done clear
  View Solution play_arrow

• question_answer79)
  If plants stop releasing oxygen into the atmosphere which of the following might happen?
  A)
  Number of plants will increase done clear
  B)
  Number of animals will increase done clear
  C)
  Animals will die done clear
  D)
  Plants will become healthier done clear
  View Solution play_arrow

• question_answer80)
  The air we breathe out contains more
  A)
  oxygen                         done clear
  B)
  carbon dioxide done clear
  C)
  water              done clear
  D)
  dust particles done clear
  View Solution play_arrow

• question_answer81)
  Which of the following leads to the destruction of ecosystem?
  A)
  Soil erosion                  done clear
  B)
  deforestation done clear
  C)
  Both (a) and (b)    done clear
  D)
  Neither (a) nor (d) done clear
  View Solution play_arrow

• question_answer82)
  Loss of top soil is called _______ .
  A)
  corrosion                     done clear
  B)
  erosion done clear
  C)
  washing                       done clear
  D)
  denudation done clear
  View Solution play_arrow

• question_answer83)
  Animals that depend upon food produced by autotrophs are called
  A)
  herbrivores     done clear
  B)
  carnivores done clear
  C)
  saprophyte                   done clear
  D)
  heterotrophs done clear
  View Solution play_arrow

• question_answer84)
  Which of the following process is responsible for release of carbon dioxide by the animals?
  A)
  digestion                      done clear
  B)
  respiration done clear
  C)
  photosynthesis             done clear
  D)
  reproduction done clear
  View Solution play_arrow

• question_answer85)
  Which of the following provides nutrients to the seedlings to grow in forests?
  A)
  bacteria                       done clear
  B)
  fungi done clear
  C)
  decaying animal dung done clear
  D)
  Beetles and grubs done clear
  View Solution play_arrow

• question_answer86)
  DIRECTIONS: Match Column I with column II and select the correct answers using the code given below the columns.  

  Column-I	Column-II
  (A) Autotroph	(p) mushroom
  (B) Saprotroph	(q) bacteria
  (C) Decomposer	(r) non green plants & animals
  (D) Heterotroph	(s) green plants

  A)
  (A) \[\to \] (s),(B) \[\to \] (p),(C) \[\to \] (q),(D) \[\to \] (r) done clear
  B)
  (A) \[\to \] (p),(B) \[\to \] (s),(C) \[\to \] (r),(D) \[\to \] (q) done clear
  C)
  (A) \[\to \] (r),(B) \[\to \] (q),(C) \[\to \] (p),(D) \[\to \] (s) done clear
  D)
  (A) \[\to \] (s),(B) \[\to \] (p),(C) \[\to \] (r),(D) \[\to \] (q) done clear
  View Solution play_arrow

• question_answer87)
  DIRECTIONS: Match Column I with column II and select the correct answers using the code given below the columns.

  Column-I	Column-II
  (A) Photosynthesis	(p) release of \[\text{C}{{\text{O}}_{\text{2}}}\]
  (B) Respiration	(q) forest, ocean
  (C) Ecosystem	(r) release of \[{{\text{O}}_{\text{2}}}\]
  (D) Deforestation	(s) cutting of trees

  A)
  (A) \[\to \] (p),(B) \[\to \] (r),(C) \[\to \] (p),(D) \[\to \] (s) done clear
  B)
  (A) \[\to \] (p),(B) \[\to \] (r),(C) \[\to \] (s),(D) \[\to \] (q) done clear
  C)
  (A) \[\to \] (r),(B) \[\to \] (p),(C) \[\to \] (s),(D) \[\to \] (q) done clear
  D)
  (A) \[\to \] (r),(B) \[\to \] (p),(C) \[\to \] (q),(D) \[\to \] (s) done clear
  View Solution play_arrow

• question_answer88)
  DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 1 Plants and animals are interdependent on each other. Plants give out oxygen which animals take in during respiration. By observing the interdependence we can say that
  A)
  Someday all the \[{{O}_{2}}\] will be used up by animals. done clear
  B)
  Someday all the \[C{{O}_{2}}\] will be used up by plants done clear
  C)
  The amount of \[{{O}_{2}}\] is increasing and that of \[C{{O}_{2}}\]is decreasing in our atmosphere. done clear
  D)
  The level of \[{{O}_{2}}\] and \[C{{O}_{2}}\] in the atmosphere is kept constant. done clear
  View Solution play_arrow

• question_answer89)
  DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 1 Plants and animals are interdependent on each other. Plants give out oxygen which animals take in during respiration. Plants and animals help in maintaining the balance of
  A)
  water and soil done clear
  B)
  green plants and insects done clear
  C)
  oxygen and carbon dioxide done clear
  D)
  minerals and oxygen done clear
  View Solution play_arrow

• question_answer90)
  DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 1 Plants and animals are interdependent on each other. Plants give out oxygen which animals take in during respiration. What will happen if more plants are cut?
  A)
  animals will die done clear
  B)
  less \[C{{O}_{2}}\] will be released done clear
  C)
  number of animals will increase done clear
  D)
  nothing will happen done clear
  View Solution play_arrow

• question_answer91)
  DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 2 Deforestation began by clearing forests so that crops could be grown. Forests serve as water purifier system in nature. Forests are good source of plants, we should not destroy the forests. What is a forest?
  A)
  a big area                    done clear
  B)
  an ecosystem done clear
  C)
  trees done clear
  D)
  a place where animals live done clear
  View Solution play_arrow

• question_answer92)
  DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 2 Deforestation began by clearing forests so that crops could be grown. Forests serve as water purifier system in nature. Forests are good source of plants, we should not destroy the forests. Forests prevent ______
  A)
  soil erosion                  done clear
  B)
  rain done clear
  C)
  flood               done clear
  D)
  Both (a) and (c) done clear
  View Solution play_arrow

• question_answer93)
  DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 2 Deforestation began by clearing forests so that crops could be grown. Forests serve as water purifier system in nature. Forests are good source of plants, we should not destroy the forests. Which of the following activities cause destruction of ecosystem?
  A)
  deforestation       done clear
  B)
  A forestation done clear
  C)
  Cultivation                   done clear
  D)
  none of these done clear
  View Solution play_arrow

• question_answer94)
  DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Different layers of vegetation are a source of food and shelter for animals, birds and insects Reason (R): The animals like boar, bison, Jackals and elephants live in deeper areas of forests.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer95)
  DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): All animals depend ultimately on plants for food. Reason (R): Organisms which feed on plants afterwards get eaten by other organisms and soon.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer96)
  DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): When an animal dies in the forest, it becomes food for vultures, crows Jackals and insects. Reason (R): There is no waste in forests.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer97)
  DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): In an ecosystem all food chains are linked. Reason (R): There are many food chains in an ecosystem.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer98)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Forests act as water purifier (ii) Forests act as air purifier (iii) Forests provide food and shelter to animals
  A)
  Statements (i) and (iii) are incorrect but (ii) is correct. done clear
  B)
  Statements (i) and (ii) are incorrect but (iii) is correct. done clear
  C)
  All statements are correct. done clear
  D)
  All statements are incorrect. done clear
  View Solution play_arrow

• question_answer99)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Forests provide medicines, timber etc. (ii) Forests maintain moisture (iii) Forests prevent soil erosion
  A)
  Statements (i) and (iii) are incorrect but (ii) is correct. done clear
  B)
  Statements (i) and (ii) are incorrect but (iii) is correct. done clear
  C)
  All statements are correct. done clear
  D)
  All statements are incorrect. done clear
  View Solution play_arrow

• question_answer100)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Forests cause droughts (ii) Forests cause floods (iii) Forests cause rainfall
  A)
  Statements (i) and (iii) are incorrect but (ii) is correct. done clear
  B)
  Statements (i) and (ii) are incorrect but (iii) is correct. done clear
  C)
  All statements are correct. done clear
  D)
  All statements are incorrect. done clear
  View Solution play_arrow

• question_answer101)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Trees form the middle layer in a forest (ii) Trees have crowns of same size (iii) There are no creepers and climbers in a forest.
  A)
  Statements (i) and (iii) are incorrect but (ii) is correct. done clear
  B)
  Statements (i) and (ii) are incorrect but (iii) is correct. done clear
  C)
  All statements are correct. done clear
  D)
  All statements are incorrect. done clear
  View Solution play_arrow

• question_answer102)
  DIRECTIONS: Carefully observe pictures given below and answer the following questions. Which of the following is not a correct food chain?
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  All the above are not correct done clear
  View Solution play_arrow

• question_answer103)
  DIRECTIONS: Carefully observe pictures given below and answer the following questions. Look at the following picture of canopy and understory in a forest and answer the following question Look at the above diagram. In this diagram A shows.
  A)
  canopy                         done clear
  B)
  crown done clear
  C)
  understorey                  done clear
  D)
  none of these done clear
  View Solution play_arrow

• question_answer104)
  DIRECTIONS: Carefully observe pictures given below and answer the following questions. Look at the following picture of canopy and understory in a forest and answer the following question In this diagram B shows.
  A)
  canopy                         done clear
  B)
  crown done clear
  C)
  understorey                  done clear
  D)
  none of these done clear
  View Solution play_arrow