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.