Answer:
C
Explanation:
Experiments can be done to prove whether it is true or not.
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The answer is
A
Behavior isolation is behaviors involved in mating which could also cause it to prevent mating
Answer:
Cell membranes serve as barriers and gatekeepers. They are semi-permeable, which means that some molecules can diffuse across the lipid bilayer but others cannot. ... Specialized proteins in the cell membrane regulate the concentration of specific molecules inside the cell.
