Review - Simple Invertebrates

Flatworms are in which phylum?

• porifera

• cnidaria

• nematoda

• platyhelminthes

Sponges are in which phylum?

• cnidaria

• porifera

• mollusca

• annelida

Which worms have a true coelom?

• flatworms (platyhelminthes)

• roundworms (nematodes)

• segmented worms (annelids)

What kind of mollusk is this?

• bivalve

• gastropod

• cephalopod

What kind of mollusk is this?

• bivalve

• gastropod

• cephalopod

The main shape of a jellyfish can be classified as:

• Polyp

• Nerve net

• Medusa

• Nematocyst

Which invertebrate animal group has sharp structures known as spicules for protection?

• sponges (poriferans)

• cnidarians

• roundworms (nematodes)

• mollusks

Which invertebrate animal group has stinging cells called cnidocytes?

• sponges (poriferans)

• cnidarians

• roundworms (nematodes)

• mollusks

Which phyla of worms have an incomplete gut?

• Platyhelminthes

• Nematoda

• Annelida

• Gastropoda

Which phylum of worms displays segmentation?

• Platyhelminthes

• Nematoda

• Annelida

• Gastropoda