Bio 111 SP24 Ex. 1 Animals

Which of the following is NOT one of the 4 important evolutionary innovations in early animals?

• Symmetry

• Body Cavity

• locomotion

• Tissues

• Segmentation

Classification that contains all animals that have true tissues?

• Parazoa

• Eumetazoa

• Protostomes

• Lophotrochozoa

Animals of this phylum lack symmetry and do not possess any tissues.

• Porifera

• Cnidaria

• Ctenophora

• Mollusca

Coelomates:

• None of the above

• No body cavity

• Body cavity between mesoderm and endoderm

• Body cavity entirely within mesoderm

Protostomes develop ______ first from blastopore; Deuterostomes develop ______ first from blastopore

• Ectoderm, Endoderm

• Anus, Mouth

• Mouth, Anus

• Endoderm, Ectoderm

Wheel Animal - mainly freshwater zooplankton

• Platyhelminthes

• Rotifera

• Annelida

• Mollusca

This class of invertebrates has a closed circulatory system and highly developed nervous system with learning and complex behaviors

• Cephalopoda

• Bivalvia

• Arthropoda

• Gastropoda

Segmented worm; ventral nerve cord; hydrostatic skeleton; closed circulatory system; coelomates

• Gastropoda

• Platyhelminthes

• Annelida

• Nematoda

Thin body form; acoeomate; often a parasite; aqueous environments

• Nematoda

• Annelida

• Mollusca

• Platyhelminthes

Phylum?

• Annelida

• Platyhelminthes

• Mollusca

• Nematoda