Answer:
A. The molecule to which a drug binds
Explanation:
I would say almost all types of muscles. Skeletal, cardiac, or smooth, they all need neurons. Without them, it could cause flaccid and spastic paralysis, or other types of diseases.
The answer is the second choice: variation, overpopulation, adaptation
Answer:# 1 is salt #2 is fresh #3 fresh #4 salty
Explanation:
Semi permeable means that some things can go in and out of the cell, but some cannot. Permeable means it allows things to pass through it, so semi permeable means only some things pass through.