In cellular respiration / animals / aerobic organisms / photosynthesis
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The cell membrane helps to control what enters and leaves a cell. The substance which accounts for two-thirds of a cells mass is water. That makes the answer D.
Answer:
From the energy stored in food substance( glucose) as Chemical energy to the energy of motion,which is Kinetic energy.
Explanation:
The energy is produced in the mitochondria which are packed in the flagellum of the a sperm cells.Thus as the sperms move the these flagella flips back and forth,Energy inform of ATPs are generated from the glucose(chemical energy) during cellular respiration in the mitochondria, this energy is converted to Kinetic energy for motility.
Specifically,ATP production for the sperm cells is initiated by Glycolysis. This is because the environments where it swims to meet the ovum punctuates with in oxygen, besides,Glycolysis can occur with or without oxygen.
Sperm motility is very important to male fertility.
Microbes cause tissue damage to their host cell or body in different ways.
1. Microbes can release toxins that can damage the cells and tissues of the host.
2. Microbes can release enzymes that can breakdown the cells and tissues of the host.
3. Microbes can activate certain responses in the host that can make the latter destroy its own tissues. Usually, the immune response of the host cell is disturbed, making the immune system attack the cells of the host itself.