Shared Flashcard Set

Details

Bio 122 Test 3
mollusks (pink packet)
23
Biology
Undergraduate 1
04/02/2014

Additional Biology Flashcards

 


 

Cards

Term
visceral mass
Definition
soft area containing internal organs of mollusk
Term
what covers the visceral mass of mollusks?
Definition
mantle
Term
How are mollusk shells formed?
Definition
secreted by mantle
Term
radula
Definition
file-like, in mouth of mollusks
Term
mantle cavity
Definition
in mollusks, at outside of body, receives digestive and metabolic wastes, gametes
Term
T/F: the crop performs digestion
Definition
F
Term
What type of digestive system is present in mollusks?
Definition
tube with organs
Term
nephridia
Definition
remove nitrogenous wastes
Term
Which of the following is not true of the mollusks?
A. nephridia are present
B. all have a closed circulatory system
C. a reduced true coelom is present
D. the hand is used for locomotion and burrowing
E. two of the above
Definition
E. (B and D)
mollusks may have an open or closed circulatory system,
the foot is used for locomotion and burrowing
Term
T/F: mollusks have capillaries and hemocoel
Definition
F. they do not have capillaries, but do have hemocoel
Term
hemocoel
Definition
body cavity of mollusks where blood circulates
Term
Gastropoda
Definition
mollusks- snails, slugs
Term
Bivalvia
Definition
mollusks- bivalves (clams, mussels, oysters)
Term
Cephalopoda
Definition
mollusks- octopi, squid
Term
Which of the following is not true of the bivalves?
A. have marked cephalization
B. are filter feeders
C. have 3 ganglia
D. are unisexual
E. have gills
Definition
A. they have little cephalization
Term
Which of the following is true of the bivalves?
A. they are active swimmers
B. they have an open circulatory system
C. they have a well developed brain
D. they exchange oxygen through the mantle
E. they are omnivores with radula
Definition
B.
they are sessile, only have 3 ganglia, exchange oxygen with gills, and are filter feeders
Term
Which of the following is not true of the cephalopods?
A. are unisexual
B. have no shell or an internal shell
C. move with jet propulsion
D. have a radula
E. all are true
Definition
E.
Term
Which of the following is true of the cephalopods?
A. are slow crawlers
B. have 4 tentacles, 2 with eyes
C. have a well developed brain
D. are sequential hermaphrodites
E. are filter feeders
Definition
C.
they are active swimmers, have tentacles but eyes are on body, are unisexual, and are predators
Term
Which of the following is not true of the Gastropods?
A. have 180* torsion
B. have 1 coiled shell
C. have a closed circulatory system
D. are omnivores
E. more than one of the above
Definition
C. they have an open circulatory system
Term
Which of the following is true of the gastropods?
A. exchange oxygen through the mantle
B. have 3 ganglia
C. are filter feeders
D. have jet propulsion
E. have little cephalization
Definition
A.
they have about 6 ganglia, are omnivores with a radula, are slow crawlers, and have marked cephalization
Term
sequential hermaphrodites
Definition
immature male develops into mature female
Term
flexion
Definition
in gastropods, back end curled on top of front
Term
rotation
Definition
in gastropods, so the anus is not directly above mouth/ head
Supporting users have an ad free experience!