The purpose of vesicles is simply water retention
A is true because they do have a true nucleus or membrane-bound organelles .
Valves ensure blood flows toward your heart. Vein valves work to bring the blood that flowed down via arteries back up to your heart.
Answer: hydrogen
Explanation:
Two elements make up the overwhelming majority of the sun's matter, by mass: hydrogen (about 70 percent) and helium (about 28 percent).
Answer:
The cell membrane holds the cell's internal contents from its environment.
The cell membrane is comprised of two layers of fat.
The cytoplasm is a liquid in which the various organelles of the cell are suspended.
The cytoplasm keeps organelles in place. It also allows different materials to flow from one organelle to another.
The nucleus of a cell contains genetic material. DNA, RNA and mitochondria replicate in the nucleus. The nucleus also produces and replicates proteins, and sends the proteins to other parts of the cell.
I hope this helped
