Answer:
The pesticide measurements were the controlled variable
Explanation:
When air is inhaled, oxygen diffuses from the alveoli into the blood to be used for respiration by the body’s cells. Carbon dioxide is a waste product made by the body’s cells during respiration.
Answer:
It makes lipids, phospholipids as in plasma membranes, and steroids.
Explanation:
<span>C) from evidence gained by many experiments of many scientists</span>
