Marine Unit 2 Review

Sponges belong to which group of animals?

• Vertebrates
• Invertebrates

How do sponges obtain food?

• filter it from the water

• grasp it with tentacles

• pry it apart with tube feet

• put it in their mouth with jointed legs

The largest free-living marine worm found in the sea...

• Sandworm

• Tube worm

• Bloodworm

• Ribbon worm

Which worm is a parasite?

• Tapeworm

• Bloodworm

• Sandworm

• Ribbon worm

What is true about sponges?

• They have organs

• They have tissues

• They have a backbone

• They are animals

Because sponges cannot move around they are considered ______. 

• sessile
• senile
• sedementary
• spongin

Ribbon worms use a sharp organ used to spear prey. This organ is known as the...

• Nematocyst

• Polyp

• Proboscis

Cnidarians have what type of symmetry?

• Asymmetry

• Radial

• Bilateral

• No symmetry

Jellyfish have what type of body structure

• Medusa

• Polyp

• Hydra

• Branched

Sea anemones have what type of body structure?

• Medusa

• Polyp

• Down

• Sessile