Exam 34: Protostomes

The excretory structures of terrestrial arthropods are slender projections from the digestive tract that are attached at the junction of the midgut and hindgut.These are called

Which feature is an evolutionary novelty of hexapods?

How would an earthworm stretch its body to reach a patch of dirt after crossing a hot sidewalk?

Why doesn't a tapeworm have a mouth on its scolex?

In their basic body plan, mollusks have a visceral mass covered with a soft epithelium and a muscular ____ that is used in locomotion.

The medicinal leech, once used to withdraw "unhealthy" blood from patients, produces ____________ to ensure blood flow from the host?

Squids and octopuses move by means of water movement through their

Radula modification allowed all of the following functions in gastropods except

In some arthropods tagmatization has produced a combination of head and thorax known as a

Brachiopods develop as protostomes, but they show ______ cleavage.

Chelicerae function as

Which one of the following incorrectly matches a molluscan structure with its typical function?

Nauplius, a unique kind of larva, is characteristic of

Earthworms show all of the following features except

Which one of the following statements about the phylum Brachiopoda is false?

Which of the following organs of cephalopods resemble those of the vertebrates?

The phylum that includes snails, clams, oysters, and octopuses is the

The rasping tongue, the radula, is present in which molluscan group?

The partitions that separate the segments of the annelid body are known as

The passage of an arthropod through stages from egg to adult is