(P4) Science Ch. 2 Assessment

Front

What are the three main phyla of worms?

Back

Annelids (segmented), Platyhelminthes (flat), and Nematodes (round) are the three main phyla of worms.

Front

What protein are feathers, hair, and horns made of?

Back

Keratin is the protein that makes up feathers, hair, and horns.

Front

What class of vertebrate animals begins life in water and undergoes metamorphosis?

Back

Amphibians are the class of vertebrate animals that begin life in water and undergo metamorphosis.

Front

What percentage of animals in the world are classified as invertebrates?

Back

The vast majority of animals in the world are classified as invertebrates.

Front

What do most arthropods have on the outside that protects them?

Back

Most arthropods have an exoskeleton on the outside that protects them.

Front

What is the definition of invertebrates?

Back

Invertebrates are animals that do not have a backbone.

Front

What is an exoskeleton?

Back

An exoskeleton is a hard outer structure that provides support and protection to some animals, such as arthropods.

Front

What is the main characteristic of amphibians?

Back

Amphibians are characterized by their ability to live both in water and on land.

Front

What is the role of keratin in animals?

Back

Keratin provides structure and protection in feathers, hair, and horns.

Front

Name a key feature of platyhelminthes.

Back

Platyhelminthes, or flatworms, are characterized by their flat bodies.