bird structure
you find a bird with naturally oily feathers and webbed feet. what kind of bird is it most likely to be?
what is a waterfowl?
which group of animals are not viviparous
monotremes
what kind of bones do birds have
hollow
bone structure that a flightless bird is most likely to lack.
what is a keel.
what distinguishes marsupials from other mammals
they have pouches to carry their young
what bone structure do birds exclusively have
a keel
how do many species of birds survive the harsh winters of their breeding grounds?
most birds migrate to warmer climates.
name one characteristic that all mammals have
fur endothermic, or have mammary glands
endothermic vertebrates don't require insulation because of their own body heat
false
the three systems that empty into the cloaca.
what are the excretory, digestive and reproductive systems.
what makes mammals' respiratory systems different from other animals
mammals have a diaphragm
elliptical wings are fast
true
put barb feather barbule and hook in order
feather barb barbule hook.
what structure do mammals use to nurse their young
with their mammary glands
most mail birds are silent in mating season