Invertebrate Diversity & Classification

In which invertebrate phylum did true tissues become a significant characteristic?

• Cnideria

• Proifera

• Nematoda

• Platyhelminthes

The mollusks, annelids, and arthropods are _____.

• protosomes

• deutrostomes

• schisotosomes

• none of the above

Members of this invertebrate phylum lack true tissues

• cnideria

• porifera

• echinodermata

• chordata

Multicellularity, specialized cells, asymmetry, and an incomplete digestive system are all characteristics of:

• Porifera

• Nematoda

• Echinodermata

• Mollusca

The phylum ______ contains the earliest invertebrates

• Mollusca

• Arthropoda

• Cnidaria

• Porifera

The closest related phylum to Chordata is _____.

• Cnidaria

• Mollusca

• Arthropoda

• Echinodermata

Which phylum has the following notable characteristics: segmented body & primitive brain?

• Annelida

• Arthropoda

• Mollusca

• Echinodermata

A roundworm is an example of _____.

• Porifera

• Arthropoda

• Nematoda

• Mollusca

Which invertebrate is in the phylum arthropoda?

• Clams

• Flatworms

• Jellyfish

• Crustaceans

In which invertebrate phylum did cephalization evolve?

• Platyhelminthes

• Cnideria

• Annelida

• Nematoda