From a classification standpoint, which of these organisms is LEAST like the other three?

• lobster
• alligator
• whale
• snake

Which group of animals does this list of characteristics describe?
-lays eggs in water
-thin skin
-undergoes metamorphosis

• mammals
• reptiles
• amphibians
• birds

Which group of animals does this list of characteristics describe?
-hollow bones
-nest building
-endothermic
-thin-shelled, hard eggs

• birds
• amphibians
• reptiles
• mollusks

Which group of animals does this list of characteristics describe?
-four-chambered heart
-nurses young with milk
-has hair or fur
-births live young

• amphibians
• reptiles
• echinoderms
• mammals

The giraffe and the alligator belong to different groups but are alike in some ways. How are the two organisms similar?

• They both have sharp teeth.
• They both have scaly, dry skin.
• They are both ectotherms.
• They both have backbones.

Both whales and goldfish live in the ocean. Whales are classified as mammals and goldfish are classifies as fish.  Which characteristic makes whales different from goldfish?

• Goldfish give birth to babies while whales lay eggs.
• Goldfish breathe through gills while whales breathe through lungs.
• Goldfish are invertebrates while whales are vertebrates.
• goldfish are warm-blooded while whales are cold-blooded.

Choose the characteristic from the list that does NOT describe a mollusk?

• has a "foot"
• have soft bodies
• some have one or two shells
• are  endothermic

What is mimicry?

• When an animal blends in to its surroundings
• When an animal copies another animal so that predators won't eat it.
• When an animal moves to another area in the winter because its food source becomes scarce.
• When an animal slows down its heart rate and breathing rate and goes into a sort of deep sleep for the winter.

What would be the response of an ectothermic animal if there is a drop in the outside temperature?

• The animal would freeze and die.
• The animal would become less active.
• The animal would become more active.
• The change in temperature would not affect the animal.

What would be the response of an endothermic animal if there is a drop in the outside temperature?

• The animal would immediately freeze and die.
• The animal would become less active.
• The animal would become more active.
• The change in temperature  would not affect the animal.