1.As water flows in and out of their bodies, _______ take in oxygen and food. 

A.jellyfish

B.insects

C.sponges

D.flatworms

2.A sponge can drop a piece of itself on to the floor of the ocean and the little piece then grows into a new individual. This is an example of _______. 

A.sexual reproduction

B.excretion

C.budding

D.regeneration

3.Flatworms are _______. 

A.Cnidaria

B.Nematoda

C.Platyhelminthes

D.Molluska

4.Before jellyfish get to their mature stage, they begin as a _______. 

A.medusa

B.polyp

C.mesoglea

D.cnidarian

5.Almost all cnidarians use special cells called _______ at the ends of their tentacles to inject poison into their prey. 

A.cnidarial cells

B.mesoglea

C.nematocysts

D.polyps

6._______ are the simplest animals that exhibit bilateral symmetry. 

A.Flatworms

B.Roundworms

C.Jellyfish

D.Sea anemones

7.Leeches and earthworms are members of the _______ Phylum. 

A.Annelid

B.Cnidaria

C.Nematode

D.Platyhelminthes

8._______ are defined as animals that have a soft body which have an internal or external shell. 

A.Annelids

B.Cnidaria

C.Cnidaria

D.Mollusks

E.Sponges

9.Many _______, like octopi, squids and cuttlefish, have suckers on their tentacles that help them grab their prey. 

A.Annelids

B.Bivalves

C.Cephalopods

D.Gastropods

10.A heterotrophic multicellular organism that does not have cell walls is called a(n) _______. 

A.animal

B.plant

C.virus

D.bacteria

11.Which of the following are made of cells? 

A.armadillo

B.brick

C.cloud

D.rock