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Marine Bio > Mullusca Test > Flashcards

Mullusca Test Flashcards

0
Q

What is the shell made of

A

Calcium carbonate

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1
Q

Class of mollusca which has the largest # of species and are most successful

A

Gastropoda

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2
Q

The front part of the foot that acts like a shovel is

A

Propodium

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3
Q

A tongue like scraper used for feeding is called

A

Radula

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4
Q

The mother of pearl layer is

A

Nacreous

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5
Q

Gastropod shells are spiraled in which direction?

A

Clockwise

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6
Q

The middle layer which provides strength is

A

Prismatic

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7
Q

A plate formed on the foot which protects the opening of the shell is

A

Operculum

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8
Q

The outer skin like layer is

A

Periostracum

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9
Q

The membrane that secretes the shell is

A

Mantle

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10
Q

The smallest oldest whorl is

A

Apex

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11
Q

The opening of the shell is

A

Aperature

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12
Q

The primary characteristic to classify is

A

Type of shell

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13
Q

The shell of which organism has 8 interlocking plates

A

Chiton

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14
Q

Pigments in the skin if Cephalopods that match their surroundings to their body is

A

Chromatophores

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15
Q

Gas exchange, waste excretion, and release of fertilized egg is done by

A

Visceral mass

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16
Q

Hatchet foot

A

Pelecopods

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17
Q

What class exhibit sexual internal fertilization?

A

Cephalopoda

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18
Q

The organ responsible for controlling the amount of liquid or gas contained in each chambered nautilus is

A

Siphuncle

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19
Q

The most specialized an advanced class

A

Cephalopoda

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20
Q

The organ that regulated fluid balance is

A

Inhalant and exhalent siphons

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21
Q

Which class contains 2 laterally compressed shells

A

Bivalvia

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22
Q

Grazing, filtering, predation, scavenging

A

Feeding techniques

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23
Q

The structure that contains the digestive, excretory, an reproductive organs is

A

Nephridia

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24
Q

Gills are called

A

Ctenidia

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25
Q

This class has unmatched maneuverability in the marine environment

A

Cephalopoda

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26
Q

The eyes of this can detect shadows, images, and shades of gray?

A

Octopus

27
Q

All classes of mollusca have

A

Head foot, has a mantle, soft bodied invertebrates

28
Q

Gastropoda have

A

Nudibranch, most common class, univalve, stomach footed, has an operculum, visceral mass with organs, snail, conch, whelk, primitive heart

29
Q

Cephalopoda have

A

Foot specialized into tentacls, cuttlefish, ink sacs, nautilus, have Chromatophores, squid, octopus

30
Q

Scaphopoda have

A

Tusk shell,

31
Q

Pelecypoda have

A

Bivalve, clam, hatchet foot, oyster, scallop

32
Q

Polyplacophora have

A

Bearing many plates, chiton

33
Q

Why are mullusks commonly called shellfish?

A

Outer shell protects their soft bodies

34
Q

Another name for the shell

A

Valve

35
Q

Mass which holds the digestive, excretory? And reproductive organs

A

Visceral mass

36
Q

The muscular foot is use for

A

Locomotion

37
Q

What sheath of tissue surrounds the mantle cavity and most of the body

A

The mantle

38
Q

What type of digestive system do mullusks have

A

Complete

39
Q

A rasping organ used for feeding also scraping, tearing, and stabbing is

A

The radula

40
Q

Which 2 classes do not have radula

A

Bivalvia and Aplacophora

41
Q

What are Ctenidia?

A

Gills

42
Q

Structures used to regulate fluid balance and excrete waste are

A

Nephridia

43
Q

Do molluscs contain complicated or simple nervous and sensory systems?

A

Complicated

44
Q

The shell of mullusks are composed of

A

Calcium carbonate

45
Q

The shell is secreted by the

A

Mantle

46
Q

The 3 layers are

A

Outer-periostracum
Middle-prismatic
Outer-nacreous

47
Q

Why are shells ways to identify ancient species

A

They decay slowly and fossilize well

48
Q

What are the 2 free swimming larval stages

A

Trkchophore

Veliger larvae

49
Q

What types if feeding techniques are used by molluscs?

A

Filter feeding, grazing, scavengers

50
Q

What classes are most important to humans?

A

Bivalvia, Gastropoda, Cephalopoda

51
Q

Why are mollusca importan to humans

A

Food source and purify water

52
Q

The shell of chiton is composed of how many plates

A

8

53
Q

Chitons feed by

A

Grazing/scraping

54
Q

Which class live in tubular shells open at both ends

A

Scaphopods

55
Q

Scaphopoda feed by

A

On detritus an protist and which are captured in mucus

56
Q

Gastropods are called univalves because

A

They have a single valve

57
Q

Torsion is

A

A process that results in the rotation of the visceral mass and mantle on foot

58
Q

Torsion takes place in the

A

Veliger stage

59
Q

Are Gastropoda dioecious or monoecious

A

Both

60
Q

Pelecypods are called

A

Bivalvia

61
Q

Pelecypoda means

A

Hatchet foot

62
Q

Bivalve shells are held shut by

A

Adductor muscles

63
Q

Bivalves move by

A

The foot or clapping valves together

64
Q

The organ that extends through each nautilus chamber is the

A

Siphuncle

65
Q

Cephalopods jet water through what

A

Syphons

66
Q

Where are fertilized eggs do posited for maturation?

A

Attached to substrate

Marine Bio (18 decks)

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