D I think sorry if it’s wrong ♀️
The answer is D mitosis and cytokinesis
Answer:
Higher oxygen levels means animals can grow larger and still maintain the supply of oxygen to their muscles. Falkowski and colleagues calculated fluctuations in the atmosphere's oxygen levels from cores of deep-sea rocks dating back 205 million years.
A rough endoplasmic reticulum contains ribosomes.
Hope this helps.
Cell membrane is the largest. Most important. Of course all cells are different and shape size also. they all have difference.