Which group of animals is characterized by having an exoskeleton and jointed legs?

• Mammals

• Birds

• Reptiles

• Arthropods

What is a key feature of fish that distinguishes them from other vertebrates?

• They have fur.

• They have gills.

• They have feathers.

• They have lungs.

Amphibians are unique because they:

• Have feathers and lay eggs on land.

• Start life with gills and later develop lungs.

• Have an exoskeleton and jointed legs.

• Are warm-blooded and have fur.

Which group of animals is known for laying hard-shelled eggs and having feathers?

• Amphibians

• Mammals

• Reptiles

• Birds

Mammals are distinct from other animal groups because they:

• Have an exoskeleton and segmented bodies.

• Produce milk and have hair or fur.

• Have feathers and beaks.

• Have scales and lay eggs in water.