Chapter 37 Test Review
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
