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:
non living characteristic of virus are:
1. have no cytoplasm or cellular organelles
2. carry out no metabolism on their own
Growth,cellular differentiation and morphogenesis
Answer:
when you grow plants, they are obviously identical to there parent plan, for an example a plant that produces offspring. (parent)
