Birds
What special structures that provide insulation do birds and mammals have?
birds: feathers mammals: hair
What two groups of mammals echolocate?
bats and cetaceans
keel means....
the large ridge on a bird's sternum to which the flight muscles attach
what breastbone structure do some flightless birds lack?
keel
What purpose do layers of fat have in many endotherms?
Layers of fat provide insulation
Migration means....
the movement of an organism from one location to another often seasonally and over long distances
What two layers of a bird's egg protect the embryo?
The albumen and the shell protect a bird embryo
What structures distinguish ungulates?
Ungulates have hooved feet
Syrinx means...
the voice organ in birds
Some birds regurgitate food for their young. Where are they likely to store this food?
Their crop
mammal with a small cecum probably has what kind of diet?
they eat meat
Mammary gland means....
an organ of female mammals that produces milk to nourish the young
What would be negative consequences if vultures were to become extinct?
Decomposition would take longer, and diseases would increase
Ungulates that chew the cud have what stomach structure?
rumen
Feather means...
one of the proteinaceous structures that covers a bird and enables flight