Answer:
None of the Above.
Explanation:
The correct answer is fitness. The Theory of Evolution defines fitness as a result of the adaptations an organism has which increase its chance of survival.
B. only 3% of water on earth is fresh
They are called ENZYMES.
Enzymes speed up the rate at which the digestion process occur so that the nutrients in the food can be absorbed by the body and used for the development of the body.
Insulin receptors regulate glucose level in blood. Without that, glucose level would uncontrolled (not normal) (high and low) and it would be impossible to maintain homeostasis. I Hope I Helped You Good Luck.