Which of the following makes up the bottom layer of a soil profile? organic material
bedrock
minerals and organic material
inorganic materials

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

the answer is 100% density i've answered this question before and done the quiz myself.

i think that it is c, d, and e, hope this