The variability in beak size among the finches in the galapagos is likely the result of:
a. adaptation
b. mutations
c. natural selection
d. all of the above

only answer if you are 100% sure. in advance!

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