Which part of a molecule provides energy for life processes? * (1) carbon atoms
O (2) oxygen atoms
(3) chemical bonds
(4) inorganic nitrogen

I believe the answer is #3, chemical bonds.

I think option 3 chemical bonds is right answer

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