I think there’s is 36 protons
Answer:
Rift Valley
Explanation:
This happens when the plates pull apart. They don’t collide and are not any form of mountains.
Answer:
Explanation:
1) Excitation brings about contraction.
2) Contraction leads to an increase in blood pressure.
3) Changes in blood pressure results in the opening and closing of the heart valves.
4) The opening and closing of heart valves then regulates the flow of blood and it's volume.
Answer:
4.Cell wall protects the cell whiles organelles are found in the cell itself which is having the cell wall
