Zoology Review

These organisms all have nematocysts.

• cnidaria
• mollusca
• arthropoda
• porifera

Sponges use pores to 

• move from place to place.
• filter food from the water.
• defend themselves.

Cnidarians have what kind of symmetry?

• Radial
• Bilateral
• Asymmetrical

What is an invertebrate?

• An animal with a backbone
• a mammal
• An animal without a backbone
• birds

Which phylum is mainly asymmetrical?

• cnidaria
• porifera (sponges)
• echinodermata
• arthropoda

What type of digestive system do most cnidarians have?

• complete (Tube shaped - Two openings)

• incomplete (Bag Shaped - One opening)

what are the two body forms of a cnidarian?

• polyp and medusa

• medusa and sessile

• polyp and sessile

• medusa and radual

Concentration of nerves and other sensory organs on the anterior (front) end of the body is called____

• acoelmate
• cestoda
• cephalization
• tegument

What type of symmetry do flatworms have?

• radial
• bilateral
• no symmetry
• cephalization

Name a roundworm

• leach

• vinegar eel

• tapeworm

• earthworm