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BIO EXAM 3 > BIO EXAM 3 LEC 14 > Flashcards

BIO EXAM 3 LEC 14 Flashcards

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Biology 101 flashcards
1
Q

what are the earliest deuterostomes

A

echinoderms

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2
Q

echinoderms are

A

DEUTEROSTOMES

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3
Q

echinoderms live in

A

marine habiotats

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4
Q

echinoderms have

A

Water vascular system

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5
Q

water vascular system

A

locomotion, food / waste transportation

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6
Q

echinoderms show

A

evolutionary reversals

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7
Q

echinoderms evolutionary reversals:

A

radial symmetry, radial nerves (no CNS), little to no
cephalization, no excretory organs

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8
Q

echnioderms have what kind of body

A

triploblastic

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9
Q

echinoderms Endoskeleton contains millions of

A

calcium carbonate components called
ossicles

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10
Q

echinoderms have what for protection

A

spines, spicules

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11
Q

what kind of digestive system do echinoderms have

A

Complete digestive system

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12
Q

echinoderms have what kind of reproduction

A

asexual

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13
Q

echinoderms can regenerate

A

tissues

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14
Q

echinoderms body fluid circulation by

A

cilia

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15
Q

echinoderms blood vasular system is

A

reduced

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16
Q

how many classes are in the phylum echinoderms?

A

5

17
Q

what are the 5 classes in echinoderms (Each-O)

A

Echinoidea
Asteroidea
Crinoidea
Holothuroidea

Ophiuroidea

18
Q

asteroidea have

A

sea stars

19
Q

echinoidea have

A

sea urchins, sand dollars

20
Q

crinoidea have

A

sea lillies, feather stars

21
Q

holothuroidea have

A

sea cucumbers

22
Q

ophiuroidea

A

brittle stars

23
Q

crinoidea mobility

A

move around till they find a place to stay then become sessile

24
Q

ophiuroidea found in

A

benthic marine habitats

25
Q

what kinda of feet do Ophiuroidea. have

A

tube feet

26
Q

sea cucumbers characteristics(holothuroidea)

A

Sea cucumbers, 1150 spp.
- Greatly elongated in the oral-aboral axis
- Soft bodied
- Sea floor, beneath rocks, burrowing
- Bizarre defense mechanisms (morphological,
behavioral, and physiological defenses)

27
Q

What are Ossicles?

A

They are spines/spicules (similar to sponges) that is used for protection

28
Q

Ambulacral grooves

A

Give each arm their hardened structure

29
Q

Why do sea stars undergo autotomy?

A

o protect against viruses, to escape predators, and for reproduction

30
Q

benthic

A

Anything occurring or associated with the bottom of a body of water

31
Q

What is the major difference between Brittle stars and sea stars?

A

Brittle stars have their madreporite located on the oral side of their body and sea stars have the madreporite located on the aboral side.

32
Q

What is an example of a Behavioral defense mechanisms that Holothuroidea utilize?

A

burroe themselves

33
Q

autotomy

A

self amputation

BIO EXAM 3 (8 decks)

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