This statement is true. because the fish in the ocean have over the years learned to adapt and hide from predators.
I believe the cerebrum is the largest part of the brain, so the answer should be C.
3:they are usually microscopic
<span>The mammalian sperm cell consists of a head, a midpiece and a tail. The head contains the nucleus with densely coiled chromatin fibres, surrounded anteriorly by an acrosome, which contains enzymes used for penetrating the female egg.</span>
Preventing ph changes caused by the rising and falling pco2 of the plasma