The cladogram indicating the first appearance of the four types of feathers is below.
Review the information on the cladogram. Since we have direct evidence of the appearance of different types of feathers quite early in the dinosaur lineage, we can infer that they served a function other than flight.
a. Propose a hypothesis for the function of feathers in non-flying dinosaurs.
1 point
1
Question 2
2.
b. Use direct evidence to support inferences.
1 point
1
Question 3
3.
c. Using living animals, give an example that might support your hypothesis.