Let's review what we have learned so far. Click on the best answer to each question.

Question 1:

Feathers can be used for:

	Insulation
	Display
	Protection
	Flight
	All of the above

Question 2:

Feathers:

	Are not seen in the fossil record until Archaeopteryx.
	Have been found in all dinosaurs.
	First appear as thin filaments and later evolve into more elaborate structures.
	Are used only for flight.
	All of the above.

Question 3:

Based on direct evidence, we mapped the most likely first appearance of contour feathers on the cladogram as shown. We have not found contour feathers in all of the Maniraptorans, but we can infer that:

	They did not have them.
	They definitely had them because others do.
	They may have had them but they have not yet been found in the fossil record.
	They only appeared in birds.

Question 4:

This cladogram shows the likely first appearance of the four feather types. What can we infer from this evidence?

	Feathers only serve a single function.
	Feathers evolved for flight.
	Feathers served other functions in non-flying dinosaurs.
	There have been no changes in the appearance of feathers over time.

This will contain the quiz score and message.

Think again about all of the different types of feathers, and their functions.

Try again

Consider the four types of feathers, and where they appeared on the cladogram.

Try again

Here's a hint: new fossil finds often add new pieces to the puzzle.

Try again

Think about the variety of feathers we learned about, and the functions served by each type.

Try again

Feathers serve many functions, including insulation, display, protection and flight. Let's try another one.

We have direct evidence that the first feathers seen in the fossil record were only thin filaments. Later we see the appearance of more elaborate structures. Let's try a third question.

That's right! There's always a possibility that they existed, but have not yet been found in the fossil record. And now for the final question...

You're correct! Feathers were used for functions besides flight in non-flying dinosaurs, just as they have many uses today.

That's it, let's tally your score!