Which of the following was not a hypothesized function of early feathers?

Tubenoses get their name because:

The uncinate processes:

Which birds are similar to penguins and only found in the northern hemisphere?

Beaks are made of

Match the reptile group to the example

Which gland is closely associated with hair follicles?

Snakes and Crocodilians have ________________ salt glands and drink __________________

Which bone acts like a spring for flight?

A force of 44 N is required to hold a spring that has been stretched from its natural length of 11 cm to 14 cm. How much work is done in stretching the spring from 13 cm to 18 cm? Round your answer to 3 decimal places as necessary (100 cm = 1 m).