Test 6-echinoderms Flashcards

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1
Q

Echino means

A

Spiny

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2
Q

Dermata means

A

Skin

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3
Q

They are _____ and ____ symmetrical

A

Coelomate and radially symmetrical

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4
Q

Body is __ rayed aka ___

A

5, pentradial

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5
Q

They have a ___ skeleton

A

Calcareous

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6
Q

They posses a ____ vascular system

A

Water

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7
Q

Water vascular system is used for diabetes *3

A

Gas exchange, locomotion and feeding

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8
Q

They have a complete ____ system

A

Digestive

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9
Q

They have a reduced/open ____ system

A

Circulatory

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10
Q

They have no ___

A

Heart

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11
Q

They have a simple radial ____ system

A

Nervous

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12
Q

They have no ___

A

Brains

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13
Q

Reproductive system consists of _____ which take up a significant amount of space in the ____

A

Gonads, body cavity

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14
Q

They reproduce____ mostly on the ____

A

Sexually, outside

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15
Q

They have cilialated free swimming _____

A

Larvae

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16
Q

They are abundant on most ____ and____

A

Sea coasts and rocky shores

17
Q

Sea stars posses ___ or more arms which radiate from a ____ disk

A

5, central

18
Q

Most sea stars posses a simple light ___ at the end of each ___

A

Light sensitive eyespot

Ray

19
Q

The starfish ray is the __

A

Arms

20
Q

Starfish have ___ different stomachs that perform ____

A

2, different functions

21
Q

Starfish consists of a series of canals that eventually end in ___

A

Tube feet

22
Q

Starfish tube feet are used for *3

A

Movement, feeding and bringing in water for gas exchange

23
Q

Sea urchins posses spikes thus are between ____cm but can be found Up to ____ cm long

A

1-3cm

20cm

24
Q

Sea urchins have a ___ shape with no rays or arms

A

Globoid

25
Q

Sea urchins have a ____ and ___ on the slime which allows them to move

A

Ball and socket joints

26
Q

Sea urchins have a mouth with ___ # _______ teeth

A

5 calcium carbonate teeth

27
Q

Sea urchins have a fleshy tongue called the ____ lantern

A

Aristotles lantern

28
Q

____are observes in many echinoderms

A

Spines

29
Q

____ keep body surface clear of encrusting organism

A

Pediceariae

30
Q

Echinoderms also ___ with their natural colour

A

Camouflage

31
Q

Name 3 ecological roles of echinoderms

A
  • part of food chain larvae produce food for other creatures
  • sea urchins bore into rocks releases nutrients
  • sea cucumbers provide habitat for parasites
32
Q

Spines can be ___ or ___

A

Soft or hard