All vertebrates have

• no internal skeleton
• gills
• radial symmetry
• endoskeleton

Fish 

• are ectothermic
• are endothermic
• are invertebrates
• have lungs to breathe

A snake

• is an amphibian
• is endothermic
• Has gills for breathing
• a reptile

What phylum of animals has hollow bones, wings, and feet to escape predators?

• amphibians
• reptiles
• birds
• mollusks

A snail, octopus, oyster, and clam are

• arthropods
• echinoderms
• amphibians
• mollusks

Which group of animals are filter-feeders that have many pores?

• amphibians
• echinoderms
• arthropods
• sponges

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

The only vertebrates that are endothermic are

• amphibians and reptiles
• birds and mammals
• insects and arachnids
• echinoderms and mollusks

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

• amphibians
• echinoderms
• amphibians
• mollusks

One example of a segmented worm is

• black widow spider
• octopus
• snail
• earthworm