Cos they dont have vascular structure that can defeat gravity and transport water and minerals
Explanation:
While exercising, the muscles need additional energy as the breathing rate and volume of each breath increases to bring more oxygen into the body and remove the carbon dioxide produced. The heart rate increases to supply the muscles with extra oxygen and remove the carbon dioxide produced.
There are two daughter cells. The cell has split into two. The membrane has pinched together in the middle.
Hope that helped you.
It means that they are classified into 2 different categories.
