I think it’s Ribosomes but I could be wrong .. if so sorry
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
<span>A change in a organism's surroundings that causes the organism to react is called a stimulus</span>
Earthquakes only occur at transfer boundaries where two tectonic plates will slide or rub past each other.
If there are no boundaries in mid-America, then earthquakes are not possible.
The activation energy of a chemical reaction is closely related to its rate. Specifically, the higher the activation energy, the slower the chemical reaction will be. This is because molecules can only complete the reaction once they have reached the top of the activation energy barrier.