The Digestive System Contributes to the Success of Birds as Flying

Q16: The high-speed wings of plovers and sandpipers

Q37: The _,a group of small feathers on

Q38: The nervous system contributes to the success

Q40: Because the kidney of sea birds cannot

Q41: The raptors,such as hawks and eagles,are notable

Q42: Most species of birds tend to be

Q45: In birds,reproductive organs of both sexes shrink

Q46: Flightless birds<br>A)tend to be small.<br>B)have a well-developed

Q48: The muscle which raises the wing of

Q62: The photoreceptors in the retina that are