Answer:
the hypothesis that evolutionary development is marked by isolated episodes of rapid speciation between long periods of little or no change.
Explanation:
Option (a) has a greater chance of being the answer — the respiratory system does take in Oxygen to break down glucose into Carbon dioxide and water vapor, releasing energy.
Answer:
Its main function is to act as a barrier to protect the body from the outside world. It also functions to retain body fluids, protect against disease, eliminate waste products, and regulate body temperature.
Explanation:
