12th Class Biology Sexual Reproduction in Flowering Plant / फूलों के पौधों में यौन प्रजनन Question Bank

done SAT - Sexual Reproduction in Flowering Plants Total Questions - 35

• question_answer1)
  Double fertilization involves :
  A)
  Fertilization of egg by two male gametes done clear
  B)
  Fertilization of two eggs in the same embryo sac by two sperms brought by one pollen tube done clear
  C)
  Fertilization of egg and central cell by two sperms brought by different pollen tubes done clear
  D)
  Fertilization of egg and central cell by two sperms brought by same pollen done clear
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• question_answer2)
  Long filamentous threads protruding at the end of a young cob of maize are
  A)
  Hairs done clear
  B)
  Anthers done clear
  C)
  Styles done clear
  D)
  Ovaries. done clear
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• question_answer3)
  What would be the number of chromosomes in the cells of aleurone layer in a plant species with 8 chromosomes in its synergids
  A)
  8 done clear
  B)
  16 done clear
  C)
  24 done clear
  D)
  32 done clear
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• question_answer4)
  Treatment of seeds at low temperature under moist conditions to break its dormancy is called
  A)
  Stratification done clear
  B)
  Scarification done clear
  C)
  Vernalisation done clear
  D)
  Chelation. done clear
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• question_answer5)
  Plants of which one of the following groups of genera are pollinated by the same agency
  A)
  Triticum, Cocos and Mangifera done clear
  B)
  Ficus, Kigelia and Casuarina done clear
  C)
  Salvia, Morus and Euphorbia done clear
  D)
  Bombax, Butea and Bauhinia. done clear
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• question_answer6)
  Pineapple (ananas) fruit develops from:
  A)
  A unilocular polycarpellary flower done clear
  B)
  A multipistillate syncarpous flower done clear
  C)
  A cluster of compactly borne flowerson a common axis done clear
  D)
  A multilocular monocarpellary flower done clear
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• question_answer7)
  Which one of the following is surrounded by a callose wall?
  A)
  Male gamete done clear
  B)
  Egg done clear
  C)
  Pollen grain done clear
  D)
  Microspore mother cell done clear
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• question_answer8)
  Male gametes in angiosperms are formed by the division of :
  A)
  Microspore mother cell done clear
  B)
  Microspore done clear
  C)
  Generative cell done clear
  D)
  Vegetative cell done clear
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• question_answer9)
  Two plants can be conclusively said to belong to the same species if they
  A)
  Have more than 90% similar genes done clear
  B)
  Have same number of chromosomes done clear
  C)
  Can reproduce freely with each other and form seeds done clear
  D)
  Look similar and possess identical secondary metabolites. done clear
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• question_answer10)
  Opening of floral buds into flowers is a type of
  A)
  Autonomic movement of variation done clear
  B)
  Paratonic movement of growth done clear
  C)
  Autonomic movement of growth done clear
  D)
  Autonomic movement of locomotion. done clear
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• question_answer11)
  In the hexaploid wheat, the haploid (n) and basic (X) numbers of chromosomes are
  A)
  n = 21 and x = 21 done clear
  B)
  n = 21 and x = 7 done clear
  C)
  n = 21 and x = 14 done clear
  D)
  n = 7 and x = 21 done clear
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• question_answer12)
  Match the following ovular structure with post fertilization structure and select the correct alternative

  [a]	Ovule	1.	Endosperm
  [b]	Funiculus	2.	Aril
  [c]	Nucellus	3.	Seed
  [d]	Polar nuclei	4.	Perisperm

  A)
  a - 3, b - 2, c - 4, d -1     done clear
  B)
  a - 3, b - 2, c - 1, d - 4 done clear
  C)
  a - 1, b - 2, c - 3, d - 4 done clear
  D)
  a - 2, b - 3, c - 1, d - 4 done clear
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• question_answer13)
  Unisexuality of flowers prevent :
  A)
  Geitonogamy, but not xenogamy done clear
  B)
  Autogamy and geitonogamy done clear
  C)
  Autogamy, but not geitonogamy done clear
  D)
  Both geitonogamy and xenogamy done clear
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• question_answer14)
  Which one of the following pairs of plant structures has haploid number of chromosomes?
  A)
  Nucellus and antipodal cells done clear
  B)
  Egg nucleus and secondary nucleus done clear
  C)
  Megaspore mother cell and antipodal cells done clear
  D)
  Egg cell and antipodal cells. done clear
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• question_answer15)
  What does filiform apparatus do at the entrance into ovule?
  A)
  It brings about opening of the pollen tube done clear
  B)
  It guides pollen tube from a synergid to egg done clear
  C)
  It helps in the entry of pollen tube into synergid done clear
  D)
  It prevents entry of more than one pollen tube into the embryo sac done clear
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• question_answer16)
  Which one of the following is resistant to enzyme action?
  A)
  Pollen exine done clear
  B)
  Leaf cuticle done clear
  C)
  Cork done clear
  D)
  Wood fibre. done clear
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• question_answer17)
  The plant part which consists of two generations one within the other is
  A)
  Embryo done clear
  B)
  Germinated pollen grain done clear
  C)
  Unfertilized ovule done clear
  D)
  Seed done clear
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• question_answer18)

  Identify which of the following fruits are false fruit?
  [a]	[b]
  [c]	[d]

  A)
  a, b, c and d done clear
  B)
  b, c and d done clear
  C)
  a, b and c done clear
  D)
  c and d done clear
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• question_answer19)
  An example of a seed with endosperm, perisperm and caruncle is
  A)
  Castor done clear
  B)
  Coffee done clear
  C)
  Lily done clear
  D)
  Cotton. done clear
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• question_answer20)
  Apomictic embryos in citrus arise from :
  A)
  Maternal sporophytic tissue in ovule done clear
  B)
  Antipodal cells done clear
  C)
  Diploid egg done clear
  D)
  Synergids. done clear
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• question_answer21)
  Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called :
  A)
  Geitonogamy done clear
  B)
  Karyogamy done clear
  C)
  Autogamy done clear
  D)
  Xenogamy done clear
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• question_answer22)
  Wind pollinated flowers are :
  A)
  small, producing large number of dry pollen grains done clear
  B)
  large producing abundant nectar and pollen done clear
  C)
  small, producing nectar and dry pollen done clear
  D)
  small, brightly coloured, producing large number of pollen grains. done clear
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• question_answer23)
  Which one of the following statements is not true?
  A)
  Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups done clear
  B)
  Pollen grains of some plants cause severe allergies and bronchial afflictions in some people done clear
  C)
  The flowers pollinated by flies and bats secrete foul odour to attract them done clear
  D)
  Honey is made by bees by digesting pollen collected from flowers done clear
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• question_answer24)
  Select the correct diagram from the following regarding female gametophyte.
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
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• question_answer25)
  Cotyledons and Testa respectively are edible parts in
  A)
  Walnut and tamarind done clear
  B)
  French bean and coconut done clear
  C)
  Cashew nut and litchi done clear
  D)
  Groundnut and pomegranate. done clear
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• question_answer26)

  Directions : (26 - 30)

  In the following questions a statement of assertion followed by a statement of reason is given.

  Choose the correct answer out of the following choices:

  Assertion: Synergids absorb nourishment from the nucellus.

  Reason: These also act as shock absorber during the penetration of pollen tube.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer27)

  Assertion: Orthotropous ovule is straight with apical micropyle and basal chalaza.

  Reason: This type of ovule is most common (82 %) in the angiosperm.

   
  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer28)

  Assertion: Pollen grains are rich in nutrients like 48% carbohydrates, 26% proteins and 15% fat.

  Reason: Pollen grains consumption increase the performance of athletes and race horses.

   
  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer29)

  Assertion: Ploidy level of epidermis of pollen sac is diploid.

  Reason: Ploidy level of endodermis of pollen sac is also diploid.

   
  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer30)

  Assertion: In apocarpous, ovary is formed from fusion of two or more carpels.

  Reason: In syncarpous, ovary is also developed from fusion of two or more carpels.

   
  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer31)

  Directions : (31 - 35)

  Read the passage given below and answer the following questions. In autogamy, pollination is achieved within the same flower. Transfer of pollen grains from the anther to the stigma of the same flower. In a normal flower which opens and exposes the anthers and the stigma, complete autogamy is rather rare. Autogamy in such flowers requires synchrony in pollen release and stigma receptivity and also, the anthers and the stigma should lie close to each other so that self-pollination can occur. Some plants produce two types of following flowers -

  [a] Chasmogamous or Open flowers : Flowers with exposed anthers and stigma e.g., Catharanthus = (Vinca), Mrabilis, Potato, Sunflower etc.

  [b] Cleistogamous or Close flowers : Flower does not open at all. In such flowers, the anthers and stigma lie close to each other e.g., Viola (common pansy), Oxalis, and Commelina.

  Autogamy is an example of -
  A)
  Cross pollination done clear
  B)
  Self-pollination done clear
  C)
  Both of the above done clear
  D)
  None of the above done clear
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• question_answer32)
  Autogamy takes place in the
  A)
  Same flower of same plant done clear
  B)
  Different flowers of same plant done clear
  C)
  Different flowers of different plants done clear
  D)
  It is a chance factor. done clear
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• question_answer33)
  Flowers with exposed anthers and stigma are named as -
  A)
  Cleistogamous done clear
  B)
  Chasmogamous done clear
  C)
  Gall flower done clear
  D)
  Inter sex flower done clear
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• question_answer34)
  Which of the following is fail safe device regarding pollination?
  A)
  Chasmogamous flower done clear
  B)
  Inter sex flower done clear
  C)
  Neutral flower done clear
  D)
  Cleistogamous flower done clear
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• question_answer35)
  Oxalis is an example of -
  A)
  Open flower done clear
  B)
  Gall flower done clear
  C)
  Neuter flower done clear
  D)
  Close flower done clear
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