10th Class Science How do Organisms Reproduce? Question Bank

done Reproduction in Organisms Total Questions - 20

• question_answer1)
  The diagram shows a section through the male reproductive system. What will be the effect, if gland X is removed?        
  A)
  Fewer sperms win be formed. done clear
  B)
  Fewer sperms will be stored. done clear
  C)
  Less testosterone will be produced. done clear
  D)
  Sperms will become less active. done clear
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• question_answer2)
  In generative fertilization, a _____ fuses with a _____.
  A)
  Polar nucleus, Secondary nucleus done clear
  B)
  Male gamete, Polar nucleus done clear
  C)
  Male gamete, Female gamete done clear
  D)
  Female gamete, Secondary nucleus done clear
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• question_answer3)
  Select the incorrect statement.
  A)
  Carpel is a part of androecium. done clear
  B)
  Secondary nuclei may form a diploid polar nucleus prior to fertilization. done clear
  C)
  Synergids have filiform apparatus that guides the entry of pollen tube into the nucellus. done clear
  D)
  All of these done clear
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• question_answer4)

  New plants may be grown from groups of cells that are taken from other plants. The given diagram shows parts of a plant X.

  Cell samples obtained from which of the labelled structures will grow into new plants that are genetically identical to plant X?

   
  A)
  P                                  done clear
  B)
  Q                      done clear
  C)
  R                      done clear
  D)
  S done clear
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• question_answer5)
  ______ is a product of meiosis.
  A)
  Megaspore mother cell done clear
  B)
  Microspore mother cell done clear
  C)
  Primary endosperm nucleus done clear
  D)
  Megaspore done clear
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• question_answer6)
  Read the following statements carefully and select the option which correctly identifies true (T) and false (F) ones.

  (i) Grafting involves two closely related dicotyledonous plants each having vascular cambium.

  (ii) In Bryophyllum, adventitious buds of leaves develop into new plant.

  (iii) Gastrulation period in human female is of 280 days.

  (iv) Asexual reproduction is a common means of rapidly increasing organisms under unfavourable conditions.

   
  A)

  (i)	(ii)	(iii)	(iv)
  T	T	F	F

                  done clear
  B)

  (i)	(ii)	(iii)	(iv)
  F	F	F	T

                 done clear
  C)

  (i)	(ii)	(iii)	(iv)
  T	T	T	F

                  done clear
  D)

  (i)	(ii)	(iii)	(iv)
  F	T	F	T

    done clear
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• question_answer7)
  Select the barrier method of contraception among the following.
  A)
  Oral pill             done clear
  B)
  Femidom           done clear
  C)
         Copper T           done clear
  D)
         Vasectomy done clear
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• question_answer8)
  The given graph shows the hormonal changes during a normal menstrual cycle. What would be a likely consequence if the hormone represented by graph Q is lacking in an adult female?
  A)
  The uterine lining might not be sufficiently stable for implantation of fertilized ovum. done clear
  B)
  Levels of the hormone represented by graph P would be higher than normal. done clear
  C)
  Fertilization of ovum would fail to occur. done clear
  D)
  There would be no significant effect since the functions of the hormones overlap. done clear
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• question_answer9)
  Select the viral STD among the following.
  A)
  Gonorrhoea        done clear
  B)
  Syphilis done clear
  C)
         Hepatitis B      done clear
  D)
         Chlamydiasis done clear
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• question_answer10)
  Which of the following comparisons of the two birth control methods used by women are correct?
  A)

  Contraceptive	Tubal ligation
  No implantation of embryo	Implantation of embryo occurs

                  done clear
  B)

  Contraceptive	Tubal ligation
  No menstruation	Menstruation occurs

                  done clear
  C)

  Contraceptive	Tubal ligation
  Reversible	Reversibility is very poor

                  done clear
  D)

  Contraceptive	Tubal ligation
  Ovulation occurs	No ovulation

  done clear
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• question_answer11)
  Seminal vesicle adds ____ into semen.
  A)
  Fructose             done clear
  B)
  Mucus   done clear
  C)
         Sperms              done clear
  D)
         Both (a) and (b) done clear
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• question_answer12)
  Ovaries perform the function of
  A)
  Progesterone secretion done clear
  B)
  Estrogen secretion done clear
  C)
  Ovum formation done clear
  D)
  All of these. done clear
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• question_answer13)
  Which of the following is a characteristic of wind pollinated flowers?
  A)
  Pollen grains are heavy and dry whereas the stigma is short and sticky. done clear
  B)
  Flowers are brightly colored. done clear
  C)
  Pollen grains are light, small and dusty whereas the stigma is hairy and feathery. done clear
  D)
  Flowers are small with nectar and fragrance. done clear
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• question_answer14)
  Which of the following statements is incorrect?
  A)
  Placenta allows exchange of materials between mother and fetus. done clear
  B)
  The fetal part of the placenta consists of the cells of the chorion which produce projections called chorionic villi. done clear
  C)
  Antibody cannot cross the placenta from mother to fetus. done clear
  D)
  Placenta secretes pregnancy hormones required for supporting fetal growth and metabolic changes in mother during pregnancy. done clear
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• question_answer15)
  Match column I with column II and select the correct option from the codes given below.

  Column I	Column II
  (a) Rhizopus	(i)   Binary fission
  (b) Planaria	(ii) Budding
  (c) Leishmania	(iii) Spore formation
  (d) Yeast	(iv) Regeneration

   
  A)
  (a) - (iii), (b) - (iv), (c) - (i), (d) - (ii) done clear
  B)
  (a) - (iii), (b) - (i), (c) - (iv), (d) - (ii) done clear
  C)
  (a) - (ii), (b) - (iii), (c) - (i), (d) - (iv) done clear
  D)
  (a) - (ii), (b) - (iv), (c) - (i), (d) - (iii) done clear
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• question_answer16)

  The given figure shows monthly changes in the human ovary during the reproductive cycle.

  Which of the following statements is correct regarding the labelled structures?

     
  A)
  Before puberty, only structure T undergoes meiosis. done clear
  B)
  The hormone produced by structure R stimulates the pituitary gland to secrete luteinising hormone. done clear
  C)
  The hormone produced by structure S is responsible for the development of female secondary sex characters. done clear
  D)
  The hormone produced by P and Q stimulates the proliferation of the endometrial lining of the uterine wall. done clear
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• question_answer17)
  Refer to the given figure of lateral view of human male reproductive system and select the incorrect statements.

  (i) Part E stores sperms and secretes a fluid that nourishes them.

  (ii) Part F carries sperms from E.

  (iii) Part G produces 25% of the volume of semen and contains citric acid.

  (iv) Part H represents primary sex organ of male that produces diploid gametes.

  (v) Part I carries both sperms and urine to penis.

  (vi) Part J is extra abdominal pouch that keeps testicular temperature \[2-2.5{}^\circ C\text{ }\] higher than the body temperature.

   
  A)
  (iii), (iv) and (vi) only done clear
  B)
  (ii), (v) and (vi) only done clear
  C)
  (i), (ii) and (iv) only done clear
  D)
  (i), (iii) and (v) only done clear
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• question_answer18)
  The given diagram shows the carpel of an insect pollinated flower. What is the most likely reason for the non-germination of pollen grain Z?
  A)
  Pollen grains X and V were brought to the stigma earlier, therefore, their germination inhibited the germination of pollen grain Z. done clear
  B)
  Pollen grain Z was brought to the flower by wind, while pollen grains X and Y were brought to the flower by insects. done clear
  C)
  Pollen grain Z lacks protrusions that allow it to adhere properly onto the stigma surface. done clear
  D)
  Pollen grain Z comes from a flower of an incompatible species. done clear
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• question_answer19)
  A student decides to study the impact of removing certain flower parts on fruit formation in plant species X. He chooses three separate plants that are growing in the same plot under uniform conditions. The data is given in the table below.

  Plants	Part removed	Impact on formation
  1	Another	30% less fruit formed than average plants in the plot
  2	Stigma	No fruit formed
  3	Petal	No significant impact

  Which of the following can be inferred from the above data?
  A)
  Anthers and stigmas are crucial in sexual reproduction in species X. done clear
  B)
  Pollen grains are probably unable to germinate if they land on other parts of the carpel besides the stigma. done clear
  C)
  Species X is likely to be wind-pollinated. done clear
  D)
  Species X relies completely on cross- pollination. done clear
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• question_answer20)
  Each sperm contains a special organelle known as an acrosome that contains hydrolytic enzymes. It also contains numerous mitochondria. What are the likely functions of these organelles in relation to the sperms' overall functions?
  A)

  Acrosome	Numerous mitochondria
  Digests through egg membranes for sperm to penetrate	Provide energy for beating action of flagellum

                  done clear
  B)

  Acrosome	Numerous mitochondria
  Digests through uterine lining to reach egg	Provide energy for respiration

                  done clear
  C)

  Acrosome	Numerous mitochondria
  Digests through oviducts to reach egg	Direct overall activities of the sperm

                  done clear
  D)

  Acrosome	Numerous mitochondria
  Directs movement of the sperm though the female reproductive tract	Provide energy for fertilization of egg

  done clear
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