How do oxygen atoms compare
with each other?
a. they have different sizes.
b. they have different compositions.
c. they are the same.
d. they are very large.

C. They are the same.

Explanation:

 Hydrogen and oxygen atoms react with each other by sharing electrons, forming covalent bonds. The oxygen atom is the central atom and each hydrogen atom forms a covalent bond with the oxygen atom.

as in mitosis, dna replication occurs during interphase.   in meiosis, it occurs specifically in s phase of interphase 1.