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4 marksSexual Reproduction in Humans

CAPE Biology Unit 1 · May/June 2022 · Paper 2 · Question 3(c)

A flow chart shows the hormonal control of spermatogenesis in human males involving GnRH, LH, FSH, testosterone, and inhibin.

Using the information given in the flow chart, outline how the body controls spermatogenesis in the human male.

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Other parts of this question

  1. 3(a)(i)State a suitable hypothesis for this experiment.[2 marks]
  2. 3(a)(ii)State ONE possible source of error in the experiment.[1 mark]
  3. 3(a)(iii)State ONE change in the experiment that could have overcome the error stated in (a)(ii).[1 mark]
  4. 3(a)(iv)Identify ONE responding variable in the experiment.[1 mark]
  5. 3(b)(i)State the function of the Epidermis in the anther of a stamen.[1 mark]
  6. 3(b)(ii)State the function of the Tapetum in the anther of a stamen.[1 mark]
  7. 3(b)(iii)State the function of Pollen mother cells in the anther of a stamen.[1 mark]
  8. 3(b)(iv)Starting from the pollen mother cell, outline the steps in pollen grain formation.[3 marks]
  9. 3(b)(v)Explain the significance of double fertilization in the embryo sac of a flower.[3 marks]
  10. 3(d)(i)Using the information from Figure 6, discuss the effects of maternal smoking on foetal development. You must refer to Figure 6 in your discussion.[4 marks]
  11. 3(d)(ii)Discuss how TWO maternal behaviours, other than smoking, may contribute to low birth weight. You must include ONE lifestyle change that the physician may…[4 marks]

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