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2 marksCell Division and Variation

CAPE Biology Unit 1 · 2005 · Paper 2 · Question 7(b)(i)

Nerve cells and heart muscle cells remain in interphase, while epidermal cells divide frequently. This question refers to the functions of mitotic cell division.

Discuss why damage to the heart and the nervous system (for example, during a stroke) is dangerous.

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  1. 7(a)Describe the stages of mitosis and indicate clearly how this process ensures that EACH daughter nucleus receives a full set of chromosomes.[10 marks]
  2. 7(b)(ii)Suggest the effects that would occur if mitosis in skin epidermis were blocked.[2 marks]
  3. 7(c)Explain the degree of genetic variability that occurs among asexually reproducing organisms, self-fertilizing organisms and bisexual (male and female)…[6 marks]

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