All of the following are either structures or characteristics of members of the Class Bivalvia of the Phylum Mollusca except

Scorpions have pedipalps that are modified into claws, and chelicerae. Which taxonomic group are they a member of?

A friend asks you to explain the difference between atherosclerosis and arteriosclerosis. You say, “Well

When referring to an animal’s body, the dorsal surface is the __________________.

The germ layer that gives rise to the outer covering of the animal body and the nervous system is the:

Protostomes develop by:

All apicomplexans are nonmotile, spore forming, and parasitic.

The germ layer that gives rise to the animal digestive tube and digestive organs is called:

The coelomates are the least evolved bilaterally symmetrical animals.

Earthworms show all of the following features except