Answer:
Hi
Explanation:
It separates the content of cell from their external environment.
It controls the entry and exit of materials in nd out of cell
Answer:
all of the above can lead to increase in nitrogen
I would say the answer is b but all of the answer choices could be the correct answer(hope that helps)
A.)Scientists look for fossils that could be common ancestors on the different
continents, showing that the common ancestor once existed on one or more
