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Magnet Biology > Mollusks > Flashcards

Mollusks Flashcards

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1
Q

What does Mollusca mean?

A

soft-bodied

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2
Q

How many germ layers to mollusks have?

A

3

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3
Q

What is the body symmetry of mollusks?

A

bilateral

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4
Q

What is the segmentation of mollusks?

A

there is none

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5
Q

What is the coelem of mollusks?

A

true coelem

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6
Q

Describe the nervous system in mollusks

A

some simple; some complex

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7
Q

Describe the skeleton of mollusks

A

some hydrostatic; some exoskeleton

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8
Q

What is the visceral mass?

A

organs

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9
Q

What is the mantle?

A

thin membrane surrounding organs

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10
Q

Describe excretion in mollusks

A

tube-shaped nephridia

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11
Q

Describe respiration in mollusks

A

aquatic-gills; land-moist mantle

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12
Q

Are mollusks sexual or asexual?

A

sexual

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13
Q

What does Gastropoda mean?

A

stomach foot

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14
Q

What does Bivalvia mean?

A

two shells

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15
Q

What does Cephlaopda mean?

A

head foot

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16
Q

What is the radula in gastropoda?

A

tongue-like organ

17
Q

What type of circulatory system do gastropoda have?

A

open

18
Q

Describe the nervous system of gastropoda

A

small brain

19
Q

How to gastropoda respire

A

aquatic-gills; land-primitive lung, or diffusion through skin

20
Q

How do bivalvia digest food?

A

filter feeders

21
Q

Describe the respiration in bivalvia

A

filter oxygen from the water using gills

22
Q

Describe the circulation in bivalvia

A

open

23
Q

Describe the reproduction in bivalvia

A

sexual. they are hemaphrodites

24
Q

Describe digestion in cephalopods

A

they use radula and sharp-beak like jaws and tentacles with suckers

25
Q

How do cephalopods respire?

A

gills

26
Q

Describe the circulation in cephalopods

A

closed

27
Q

Describe the reproduction in cephalopods

A

sexual; they have separate sexes; internal fertilization; eggs put outside body

28
Q

Describe the nervous system of cephalopods

A

large brain, good eyesight, tentacles sensitive to touch

29
Q

How do cephalopods move?

A

jet propulsion

30
Q

Describe locomotion on bivalvia

A

mostly remain in one place.
clams use foot
mussels use sticky thread
scallops flap shells

Magnet Biology (29 decks)

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