Anting,a Common Habit of Many Songbirds,involves Picking Up Ants with Their

Q20: The structure that produces "pigeon's milk" is

Q21: The activity by which birds maintain a

Q22: The _,or "wishbone," of a bird is

Q23: Which of the following features of birds

Q24: A type of flight commonly used by

Q26: Posteriorly directed _ on the ribs of

Q27: A reptilian characteristic of Archaeopteryx was<br>A)Jacobson's organ.<br>B)a

Q28: A group of eggs laid by a

Q29: Over 90% of all birds are<br>A)polyandrous.<br>B)monogamous.<br>C)viviparous.<br>D)polygynous.<br>E)protogynous.

Q30: The respiratory system of birds differs from