Which type of molecule that can be found in living things lacks carbon atoms

Water.

Explanation:

Water is considered the second most important nutrient for the body, second only to oxygen. Water has no carbon in its composition as it is composed of two hydrogen atoms and one oxygen (H2O).

The body of a healthy person contains on average 60% of water distributed inside the cells, between the tissues and circulating through the veins and arteries helping in the formation of blood, as well as participating in the formation of part of all glandular secretions in the body.

the correct choice is i and iv.

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