Cnidarians & Ctenophores

Phylum Ctenophora have _______________ made of ___________ for locomotion.

• tentacles ; colloblasts

• comb rows ; cilia

• tentacles ; cilia

• comb rows ; colloblasts

When a Cnidarian catches prey, it uses stinging cells called...

• Colloblasts

• Stingers

• Cnidocytes

• Blastoscytes

How do Cnidarians get their prey into their mouths?

• contractile cells in gastrovascular cavity

• nematocysts pull prey into mouth

• contractile cells in feeding arms pull prey into mouth

• cnidocytes digest prey outside of stomach

Which of the following is a correct description of the polyp body form?

• It's mostly sessile and the tentacles point downward.

• It's mostly sessile and the tentacles point upward.

• It's mostly mobile and the tentacles point downward.

• It's mostly mobile and the tentacles point upward.

Which group of Cnidarians have a symbiosis with algae?

• anemones

• corals

• jellyfish

• comb jellies

Tags

NGSS.MS-LS2-3

The _____ enables cnidarians to respond to stimuli in their environment and send electrical impulses to the muscles.

• nerve net

• brain

• peripheral nerves

• nerve cord

Which body form is represented by this diagram?

• Mesoglea
• Medusa
• Polyp
• Polyp changing into medusa

Tags

NGSS.MS-LS4-2

What is a defining characteristic between a cnidarian and a ctenophore?

• Ctenophores are freshwater and cnidarians are marine

• cnidarians have stinging cells and ctenophores don't

• ctenophores have stinging cells and cnidarians don't

• ctenophore is another name for cnidarian

Tags

NGSS.MS-LS4-2

Which group of jellies have a sting that can kill a human?

• Hydrozoa

• Anthozoa

• Cubozoa

• Scyphozoa

How many tissue layers do Cnidarians feature?

• 1 - monoblastic

• 2 - diploblastic

• 3 - triploblastic

• depends on the species