Question

The cladogram shown here shows the common ancestor of four classes of animals. One class that is missing is the modern-day fish. What does this image tell us about the ancient lobe-finned fish?

A) Lobe-finned fish did not have scales.
B) The lobe-finned fish had lungs, not gills.
C) The fins are muscle- and skin-covered bone.
D) The lobe-finned fish was the first organism to walk on land.

Answer 1

c

Step-by-step explanation:

Answer 2

c) tThe fins are muscle- and skin-covered bone.

Step-by-step explanation:

Modern-day fish have fins that are composed of a set of webbed rays, not muscle- and skin-covered bone. Lobe-finned fish have fins of bone that articulate with the rest of the body, like the other four classes of animals in the cladogram. The cladogram also shows us that the bone structure was similar.