Which of the following classes of vertebrate is the only with a cartilaginous skeleton?

Which of the following best describes the evolutionary advantage to the amniotic egg?

A snake is discovered that kills its prey by injecting a venom through its fangs. Which type of classification would be appropriate for this snake?

Which of the following is a characteristic of all mammals?

What is the purpose of keratin in reptilian skin?

What is the name for the olfactory organ found in many reptiles?

Which of the following organisms is endothermic?

How are monotremes different from other mammals?

The class agnatha is separated from other fish due to the lack of which of the following?

What is the name for animals that carry their young in pouches?

tiger

sting ray

newt

python

lamprey

catfish

kangaroo

hammerhead shark

glass frog

tortoise

squid

flatworm

sponge

lobster

comb jellyfish

earthworm

roundworm

frogs and toads

caecilians

giraffes, deer, cattle. pigs, camels, etc.

canines, cats, bears, raccoons, etc.

whales, dolphins, orcas, porpoises, etc.

bats

alligators, crocodiles, gavials, etc.

rabbits, hares, pikas

kangaroos, opposums, etc.

horses, zebras, rhinoceroses, etc.

platypuses, echidnas

seals, sea lions, walruses, etc.

monkeys, apes, humans, etc.

elephants

mice, squirrels, hamsters, beavers, porcupines, etc.

tuatarans

lizards and snakes

turtles, terrapins, and tortoises

salamanders and newts