Which one of the following supports the hypothesis that life has changed over time?

a. fossils are distinct from rock layer to rock layer.
b. prokaryotes have no nucleus.
c. some fossil plants have deep roots.
d. the cell has no membrane.

answer: 2

explanation:

yes

bacteria could be both, harmful and to us. harmful bacteria could make us sick and probably even by getting the chances of getting a disease, but good bacteria fight it off with your immune system. there is always bacteria everywhere we go. we need to make sure to wash our hands after using the restroom, before eating, after eating, after petting an animal too. so you see, bacteria is everywhere and is harmful or . i hope this . : ) : ) : )