The diagrams below are illustrations of two different cells involved in biological processing in mammals. Study them and answer this question.
Which parts of P and Q fuse to complete the biological process?
III and I
IV and I
III and II
IV and II
Correct answer is A
P is a sperm cell whose nucleus (iii) then fuses with the egg plasma membrane (i) of the ovum (Q) and injects its nucleus and other organelles into the egg cytoplasm.