Answer:
A.The two proteins have different functions.
Explanation:
Answer:
The organization that paid for the study is biased.
Explanation:
The company that pays for the experiment would want their brand to be better than the others so they can adverse it as the best
It is called LIMITING FACTOR
X: Ozone layer destruction
Y: Mass extinction
To move a limb, muscles must contract to pull, and others must relax to allow the limb to move: for example, triceps relaxing as the biceps pull the forearm up