43. The graph shows the concentration of two ovanan enermoch in the last weeks towards the onset of labour. (a) 20 Y. 16 12 8 7-6 5 4 Identify the two hormones; (i) X (ii) PX Weeks before labour 180 160 140 120 100 2 1 Labour (01 mark) (01 mark) (b) (i) Explain how the variation in levels of hormones brings about birth. (04 marks) (iii) State the role of the two hor nones in the last days of pregnancy. **** (02 marks) (c) Both males and females produce FSI and III. Explain why there is no sexual (02 marks) cycle in the males.
