Marine Invertebrates

What are these organisms?

• Sea anemone

• Sea star

• Sea sponge

• Sea urchin

What type of body symmetry do these organisms have?

• asymmetry

• radial

• bilateral

• all of the answer choices are correct

Which phylum contains a combination of free-living and parasitic worms?

• arthropoda

• porifer

• platyhelminthes

• mollusca

Which phylum consists of organisms with "spiny skin"?

• mollusca

• echinodermata

• porifera

• annelida

What are the specialized pigment cells found in cephalopods that help them blend into their surroundings?

• mimicry

• bioluminescence

• nematocysts

• chromatophores

What does a sea cucumber do when threatened?

• burrows into the sand

• waves its tentacles around to call for help

• expels its toxic guts out

• releases nematocysts to sting whatever is threatening it

This animal has what type of symmetry?

• Bilateral

• Radial

• No Symmetry

• Asymmetric

This animal has what symmetry?

• Bilateral

• Asymmetric

• No symmetry

• Radial

What does it mean when an organism is hermaphroditic?

• They produce female gametes

• They produce both male and female gametes

• They produce no gametes

• They produce male gametes

What phylum does an octopus belong to?

• cnidaria

• molluscs

• porifer

• sponges