(a) D

(a)

(b) Pollen tube carries the male gametes to the egg cell

(c) (i) ovule changes to seed

(ii) ovary changes to fruit

OR

(a) Condoms prevent sexually transmitted diseases and unwanted pregnancies hence is advantageous to both

(b) Oral contraceptives upset the hormonal balance hence prevent production or /and release od ovum

(c) Sex selective abortion is when upon knowing the sex of the child one decides to abort it. Female foeticide is a grave setback to it.