Quelpr
4 marksSexual Reproduction in Humans

CAPE Biology Unit 1 · May/June 2026 · Paper 2 · Question 3(b)(ii)

Figure 6 shows the number of implantation sites in rats treated with Nylon IUD, Copper IUD, Zinc IUD, and their respective controls.

Based on the results of the study and additional observations of tissue inflammation and post-removal fertility, state TWO possible conclusions regarding the use of the zinc IUD contraceptive method, giving a reason for EACH conclusion.

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Other parts of this question

  1. 3(a)(i)Identify the FOUR cells labelled S, T, U, and V in Figure 5.[4 marks]
  2. 3(a)(ii)State TWO parts of the sperm cell that will enter the interior of the oocyte during fertilization.[2 marks]
  3. 3(a)(iii)In the box provided, draw a diagram of the section of the seminiferous tubule shown in the boxed area in Figure 5.[5 marks]
  4. 3(a)(iv)Describe the changes a sperm undergoes during its journey in the female tract to prepare for fertilization: Capacitation and Acrosomal reaction.[4 marks]
  5. 3(b)(i)Based on the results shown in Figure 6, state whether or not the CuIUD would be effective in preventing unwanted pregnancies, giving one reason to support your…[2 marks]
  6. 3(c)Discuss how the stages shown in Figure 7 lead to the development of the seed coat, endosperm, and embryo after fertilization. Present your response in complete…[9 marks]

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