Which order of types of cells below correctly reflects the sequence by which a sperm cell is produced?

1.     Spermatogonium A

2.     Spermatogonium B

3.     Primary spermatocyte

4.     Secondary spermatocyte

5.     Spermatid

6.     Sperm cell (spermatozoon)

The process from the formation of spermatogonium up to and including the secondary spermatocyte is called spermatocytogenesis.

The continuing process which includes maturation of the sperm cell, from the spermatid phase to the mature sperm cell is called spermiogenesis.

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands