1. Why might it be advantageous to feed on the first and second
trophic levels? What
would be the cultural and
economic repercussions on
society if humans ate only from
the first two levels?

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 c.

by: nicholas dooley