Cnidaria

Cnidarians have...

• No symmetry

• Radial symmetry

• Bilateral symmetry

Tags

NGSS.MS-LS4-2

What is the most deadly cnidarian?

• Anemone

• Box jellyfish

• Hydra

• Portuguese Man-of-War

How many cell layers do cnidarians have?

• 0

• 1

• 2

• 3

True or False: Cnidarians do not have a central nervous system.

• True

• False

How are nervous responses in cnidarians controlled?

• by their gastrovascular cavity

• through the mesoglea

• by the nerve net

• through the filaments in their nematocysts

All Cnidarians have _____, but no _____.

• stinging cells, tissue cells
• organs, tissue
• tissues, organs
• tissue, stinging cells

The phylum Cnidaria includes sea anemones, jellyfish, and coral

• True
• False

Cnidarians are mostly found in

• marine/salt water
• fresh water
• both

Identify the following Cnidarian design 

• syphozoa
• medusa
• polyp
• enteron

Polyps are ______, while medusa are ______. 

• sessile, motile
• motile, sessile
• both motile and sessile, just motile