Human males produce an abundance of sperm because

1.

The answer is C 

There are two types of spermatocytes: primary and secondary.  A primary spermatocyte undergoes Meiosis 1 to form two secondary spermatocytes.  Each of the secondary spermatocytes then undergo Meiosis 2 to form two spermatids (4 spermatids in total).  The spermatids (or sperm) then undergo mitosis producing billions of sperm. 

2.

The answer is B

The primary oocyte undergoes Meiosis 1 to produce a big secondary oocyte and a small polar body, known as the first polar body.  The secondary oocyte then undergoes Meiosis 2 to produce a big cell called an ootid and a second polar body.  The ootid then differentiates into an ovum. 

Hope this helps!