Deck 9: Polyzoa and Kryptrochozoa: Cycliophora, Entoprocta, Ectoprocta, Brachiopoda, Phoronida, and Nemertea

Question 1

The cystid is the body wall of the ectoproct zooid,together with its _____________.

Answer 1

exoskeleton

Question 2

The ribbon worms differ from the flatworms in having

A)an incomplete digestive tract.
B)protonephridia.
C)a true circulatory system.
D)a nervous system.

Answer 2

C

Question 3

Entoprocts

A)are mostly freshwater.
B)are wormlike.
C)have an incomplete digestive tract.
D)have a crown of ciliated tentacles.

Answer 3

D

Question 4

Phoronida

A)are small freshwater worms.
B)are tube-dwelling marine animals.
C)do not have a lophophore.
D)do not have a digestive tract.

Question 5

Small organisms that cling to the jaws of lobsters and eat food dropped by the host are found within the Phylum ____________.

Question 6

Ribbon worms are

A)carnivores.
B)nearly all marine dwellers.
C)nonparasitiC.
D)all of these
Fill in the Blank Questions

Question 7

The fleshy stalk of a brachiopod is the ___________.

Question 8

A lophophorate phylum that is primarily marine,but also has some freshwater members is _____________.

Question 9

Ectoprocta

A)live in marine and freshwater habitats.
B)typically form colonies.
C)superficially resemble the hydroids of cnidarians.
D)all of these

Question 10

The lophotrochozoans are now believed to include the Sipuncula,Cycliophora,Brachiopoda,Ectoprocta,and Phoronida.

Question 11

Resistant capsules containing germinative cells formed by freshwater ectoprocts are ________.

Question 12

The lophophore contains within it an extension of the ___________.

Question 13

Ribbon worms have a complete digestive tract.
Multiple Choice Questions

Question 14

The valves of brachiopods are

A)secreted by the mantle.
B)both dorsal and ventral.
C)hinged in some with a tooth-and-socket arrangement.
D)all of these

Question 15

Because of the shape of their shells,the brachiopods are commonly known as _____________.

Question 16

The lophophore of ectoprocts is extended

A)by a hydraulic mechanism.
B)when the polypide is withdrawn into the zoecium.
C)into the cystid.
D)all of these

Question 17

Some modern brachiopods have existed virtually unchanged for over 400 million years.

Question 18

Brachiopoda

A)are called bryozoans.
B)have a mantle and two valves (shells).
C)live in freshwater habitats.
D)are worm-like burrowers.

Question 19

A proposed new phylum,________________ includes animals found on the mouthparts of lobsters.

Question 20

Tiny,sessile pseudocoelomate animals that superficially resemble hydroid cnidarians belong to the phylum ______________.

Question 21

Ribbon worms seize their prey with their ________________.

Question 22

Ribbon worms do not regurgitate undigested wastes because their digestive tract has an _____________.

Question 23

Phoronids have a ____________ with two parallel ridges curved in a horseshoe shape.