Lungs evolve before the bones.

• True

• False

Which trait evolved in a common ancestor of ray-finned fishes, coelacanths, lungfishes, frogs, toads, and salamanders?

• True bones

• Lungs

• Endothermy

• Four limbs

Which trait evolved in a common ancestor of cnidarians, flatworms, mollusks, and echinoderms?

• three germ layers, bilateral symmetry

• tissues

• mouth first development

• radial symmetry

What are animal clades typically defined by?

• Evolution

• Early Animals

• Adult body plans and patterns of embryological development

• Roundworms and flatworms

When did the first animals evolve according to fossil evidence?

• 50 million years ago

• 1,000 million years ago

• 600 million years ago

• 300 million years ago

Amphibian means “double life”.

• True

• False

What is a strong connective tissue that is softer than bone?

• muscle

• bones

• cartilage

• nerve cells

Most chordates that live on land have:

• two limbs

• four limbs

• six limbs

• eight limbs

What two features define animal phyla?

__________ are cold Blooded that live in water as a larvae but live on land as an adult.