The head of the sperm serves which of the following functions ?

The head of the sperm consists of:

The middle ear serves which auditory function?

(a) What is the function of a flower? (b) Name those parts of the flower which serve the same function as the following do in the animals: (i) testis (ii) ovary (iii) eggs (iv) sperms

Head of the sperm contains the ________.