How does compression reduce swelling after an injury?
a. it cools the injured tissue.
b. it keeps the injury elevated.
c. it cuts off blood flow.
d. it narrows blood vessels.

your answer is rna to the question.

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands