1 of 20

What name is given to the food-trapping cells of sponges?

Phagocytes

Amoebocytes

Cnidocytes

Choanocytes

2 of 20

All animals

are prokaryotic.

are heterotrophic.

have cell walls made of chitin.

obtain food by absorption.

3 of 20

Features unique to mammals include

the presence of hair.

extended parental care of the young.

being endotherms.

having no egg-laying members.

4 of 20

Which of the following levels of structure encompasses all the others?

Tissue

Cell

Organ

Organism

5 of 20

Which of the following animals does not have a body cavity?

Ant

Mouse

Flatworm

Clam

6 of 20

Sharks are a type of

Tunicate.

Cartilaginous fish.

Bony fish.

Lungfish.

7 of 20

The water vascular system of a sea star functions in

movement of the tube feet.

circulation of nutrients around the body.

pumping water for swimming movements.

buoyancy

8 of 20

Neurons are specialized cells characteristic of

muscle tissue.

connective tissue.

epithelial tissue.

nervous tissue.

9 of 20

A(n) ______ is an example of an invertebrate chordate.

snake

echinoderm

lancelet

fish

10 of 20

Animals probably evolved from protists. How do animals differ from these protist ancestors?

Animals are eukaryotic.

Animals have more specialized cells.

Animals are heterotrophic.

Animals are able to reproduce.

11 of 20

Homeostasis is

the exchange of materials with the surrounding environment.

the idea that all vertebrates are built in a similar way.

the correlation of structure and function.

maintaining a relatively constant internal environment.

12 of 20

Unique features of vertebrates include the presence of a(n)

skull and backbone

notochord

endoskeleton

pharyngeal slit

13 of 20

A marine biologist dredged up a small animal from the ocean floor. It was uniformly segmented, with short, stiff appendages and soft, flexible skin. It had a complete digestive system and a closed circulatory system but no skeleton. Based on the description, this animal sounds most like a(n)

lancelet.

crustacean.

annelid.

 mollusk.

14 of 20

The feature present in reptiles and absent in amphibians that freed reptiles from the dependence on

water for reproduction is

parental care of eggs.

metamorphosis.

the lateral line system.

the amniotic egg.

15 of 20

A change in the body often triggers a response that counteracts the change. This kind of response is known as

negative feedback.

empowerment.

cause and effect.

positive feedback.

16 of 20

A _____ is a chordate, but not a vertebrate.

squid

tunicate

shark

frog

17 of 20

Pill bugs" or "sow bugs", often found under rocks and logs in moist places, have the ability to roll up into a ball when disturbed. Sow bugs are really crustaceans, not insects. Therefore, sow bugs do not have

an exoskeleton.

gills.

three pairs of legs.

antennae.

18 of 20

Which of the following tissues produces voluntary body movements?

Smooth muscle

Simple cuboidal epithelium

Cardiac muscle

Skeletal muscle

19 of 20

Which of the following are listed in the correct hierarchal order?

System-tissue-organ

Cell-tissue-organ

Organ-tissue-system

Tissue-cell-organ

20 of 20

Which of the following animals displays radial symmetry?

A worm

A sea anemone

A fish

A lobster