light bones

Allosaurus

down feathers

3-toed foot; wishbone

Fish

Frog

Salamander

Human

a. The orangutan has nothing in common with the other three organisms.

b. The four have molecular similarities, but have their own unique traits.

c. The is no evidence of any connection between the four organisms.

d. Humans are in no way similar to the other three organisms.

a. frog and human

b. bird and human

c. dinosaur and human

d. whale and human

d. shark

a. human

b. crocodile

c. bird

e. tuna

b. crocodile

a. human

c. bird

d. shark

e. saurischians

rotifers and nematodes

mollusks and annelids

mollusks and arthropods

echinoderms and chordates

I and II

II and IV

I and V

V and VI