you have discovered a new type of cell. Write 200 words on the function of it, where u found it, name it, how you found it, and why its a cell

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

i think the answer is b.

idk what happened..you tell