Sponges, cnidarians and flatworms

Which phylum is mainly asymmetrical?

• cnidaria

• porifera (sponges)

• echinodermata

• arthropoda

These organisms all have nematocysts.

• cnidaria

• mollusca

• arthropoda

• porifera

Nematocysts (stinging cells) are used for...

• Defense

• Catch organisms for food

• Both of these

Flatworms have what kind of body cavity?

• Acoelomate

• Pseudocoelomate

• Coelomate

What kind of symmetry do flatworms have?

• They are asymmetrical

• Radial symmetry

• Bilateral Symmetry