how many pairs of homologous chromosomes would be found in a mature male sperm?Explain why nervous and hormonal systems can be regarded as complementary systems that together provide the mechanism for making appropriate responses to changes in the environment:Discuss the importance of physical activity in pregnant females. (10 marks) b) What are the risks involved for pregnant females engaging in exercise AND sport activities? (5 marks) c) Explain the current recommendations for physical activity during pregnancy.

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