Chapter 12 Test: Animal Structure and Function

What is a hydrostatic skeleton?

• It is a fluid-filled internal cavity surrounded by muscle tissue.

• It is a hard outer covering, such as a shell.

• It is a hard internal structure made out of bone.

• It is a hard internal structure made out of cartilage.

The fluid filled cavity of a hydrostatic skeleton is called which of the following?

• a. a vertebrate

• b. the invertebrate

• c. a backbone

• d. a coelom

The control systems of all animals are called _____.

• nervous systems

• coelom

• nerve nets

• neurons

Nerve nets are found in animals that have which of the following?

• radial symmetry and a brain

• bilateral symmetry and a brain

• radial symmetry and no brain

• bilateral symmetry and no brain

What kind of animals move by undulation?

• only land animals

• only water animals

• both land and water animals

• No animals move by undulation.

What structure do some squirrels use to move through the air?

• wings

• fins

• tissue that is stretched out to form a parachute-like structure

• No squirrels can move through the air.

Of the following, which does NOT have bilateral symmetry?

• humans

• fish

• jellyfish

• frogs

A vertebrate is defined as having a(n) _____.

• brain

• nervous system

• anterior end

• backbone

How do butterflies and moths get nectar out of flowers?

• They use a long tongue.

• They get it on their feet.

• They use a long tubelike mouthpart.

• They bite through the flower.

Of the following, which does a fish NOT have?

• gills

• fins

• scales

• spiracles