In the first step of spermatogenesis, spermatogonia differentiate cells into
a. spermatids
b. primary spermatocytes
c. secondary spermatocytes
d. spermatozoa
e. spermatophyte

B. Primary spermatocytes

Explanation:

The germ cell line is a group of cells found inside the seminiferous tubules. This germ cells undergo mitosis (creating spermatogonia) to have a steady supply of cells that will divide by meiosis to produce gametes. When spermatogonia divide by meiosis at the end of meiosis I the newly created cells are known as primary spermatocytes.

i think the answer is

mass

not sure if this is what you'r looking for eubacteria and archaebacteria