Which description is correct for both oogenesis and spermatogenesis?

a. The cells have 46 chromosomes until meiosis Il is completed.
b. After meiosis I, the cells have 23 chromosomes.
c. Part of meiosis l is completed before birth.
d. The entire process takes about 70 days.

Which organelles are involved in energy conversion

What types of energy transfers and energy transportations are involved in the domino chain reaction?

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?