If It Is an Advantage to Be a Food Specialist

Q47: The seasonal loss of bird feathers is

Q48: Feathers are<br>A)living structures that continue to grow

Q49: Migration in birds<br>A)is inborn and instinctive.<br>B)allows these

Q50: The common chamber that receives material from

Q51: The bird that makes the longest known

Q53: In comparing the bird circulatory system to

Q54: Flying birds with keeled sternums are known

Q55: Because birds lack teeth to grind up

Q56: Flightless birds<br>A)have evolved mostly on islands without

Q57: Generally,in cases of polygamy,male birds are smaller