Chapter 37 Test Review

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Of the following organs, the one that does NOT exist in the annelids is the

Gills

The gills of bivalves are covered with a sticky mucus

In order to trap small organisms consumed as food

The evolution of a coelom was significant because

It enabled development of more complex organ systems

Which of the following has a true coelom?

Mollusk

Small tubules that collect wastes from the coelom of mollusks and discharge them from the body are called

Nephridia

The structure labeled "A" in the diagram is the ventral ________ cord.

Nerve

One of the four types of tissue, the tissue that is specialized to transmit and receive messages in the body is

Nerve tissue

All of the following are classes of the phylum Mollusca EXCEPT

Pseudopods

Different regions of an annelid's body specialize for different functions.

True

In terrestrial snails, the mantle cavity functions as a simple lung.

True

Mollusks and annelids are believed to be the first animals to develop a true coelom.

True

Most bivalves have separate sexes, but some are hermaphroditic.

True

Some leeches have become specialized to a parasitic way of life by developing the ability to suck blood from the bodies of other organisms.

True

While all but one group of mollusks have open circulatory systems, all annelids possess closed circulatory system.

True

Movement of this organism is dependent upon the structure labeled

"3"

All of the following are characteristics of mollusks EXCEPT that they have

A pseudocelomate body plan

Segmented worms are known as

Annelids

Trochophore larvae

Are found in molluscan life cycles possess a belt of cilla around their bodies Occur in annelid life cycles The answer is all of the above

The organism shown in this diagram is a

Bivalve

Of the major classes of mollusks, the one that contains sessile filter-feeders is the _________.

Bivalves

In an open circulatory system

Body tissues are bathed directly in blood

the foot of the mollusk performs all of the following functions EXCEPT

Capturing prey

"Jet Propulsion" is the usual means of locomotion in water for

Cephalopods

Constant beating of _______ in the mantle cavity of mollusks causes a continuous stream of water to pass over the gills.

Cillia

A characteristic structure found in many mollusks is the radula, which is involved in

Eating

All Mollusk shells are lined with and secreted by a fleshy fold of tissue called the foot.

False

Due to the presence of a shell, all gastropods are capable of living on land for at least a portion of their lives.

False

Mollusks have four distinct body parts: a foot, a head, a visceral mass, and a tail.

False

Since cephalopods have tentacles, they have no need for a radula.

False

Jet propulsion in an octopus or squid is the result of

Forcefully squeezing water from the siphon

In one anterior segment of annelids there is a _________, which is the brain of these organisms.

Ganglion

All of the animal phyla that evolved after the mollusks

Have a coelom

The clitellum of an earthworm

Is associated with reproduction

The only cephalopod that has retained its external shell is the

Nautilus

This organism possesses

Open circulatory system

Which two organisms in the diagram possess mantles?

Organisms "A" and "C"

Which of the following is correctly paired?

Phylum Mollusca - Octopus

An organ known as the _______ is a rasping, tonguelike structure found in some mollusks.

Radula

the digestive tube of annelids is divided into three regions. Which of the following is NOT among these

Radula

Parapodia are involved in all of the following EXCEPT

Reproduction

The most significant evolutionary advancement of annelids over mollusks is believed to be

Segmentation

The evolution of tremendous diversity in the phylum Annelida is due primarily to

Segmented bodies

A similarity between annelids and arthropods is that they both have

Segmented body patterns

Twisting of the visceral mass of gastropods is called

Torsion

Coordinated movements of an annelid's body segments are possible because of the

Ventral nerve cord and paired segmental ganglia

Among the various species of gastropods, respiration may take place

With gills, through the skin, and with lungs

cephalopod motion : siphon ::

annelid circulation : closed circulatory system

The basic body plan of an annelid

is a tube within a tube

leechees : blood ::

marine worms : small animals

Leeches

use suckers to aid in movement, are segmented, and may be parasitic


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