Animal Classification

All vertebrates have

• no internal skeleton
• gills
• radial symmetry
• endoskeleton

A snail, octopus, oyster, and clam are

• arthropods
• echinoderms
• amphibians
• mollusks

Arthropods can be divided into many groups. The three that we study are

• crustaceans, insects, arachnids
• echinoderms, segmented worms, sponges
• mammals, birds, fish
• amphibians, reptiles, birds

A crab is in which group of arthropods?

• arachnids
• crustaceans
• insects
• echinoderms

Which is not a characteristic of mollusks?

• soft bodies
• gills or lungs
• exoskeleton
• some have shells

Which of the following is not cold blooded?

• amphibian
• mammal
• reptile
• fish

Which of the following is in the same group as a crab?

• squid
• leech
• spider
• sponge

Lungs and moist skin are characteristics of which of the following vertebrates?

• amphibians
• fish
• reptiles
• lizards

Spiny stars, sea stars, sea urchins, and sea cucumbers are

• crustaceans

• echinoderms
• amphibians
• mollusks

Which mammal layss eggs?