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Biology 2 > Ch 21b > Flashcards

Ch 21b Flashcards

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1
Q

what are the 8 invertebrate phyla?

A
  1. porifera
    2.cnideria
  2. Platyhelminthes
  3. nematode
  4. mollusca
  5. annelida
  6. arthropoda
  7. echinodermata
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2
Q

Phylum porifera

A

sponges

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3
Q

Phylum porifera symmetry

A

radial or assymetrical

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4
Q

do porifera have flagellated larvae?

A

yes

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5
Q

Phylum Cnidaria

A

Jelly fish, hydra, sea anemone, coral, portuguese man of war

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6
Q

4 importances of porifera

A
  1. few animals eat or attack
  2. many arthropods, mollusks, worms, or fish inhabit
  3. attach to shellfish and absorb shell
  4. sponge industry in Mediterranean or Gulf
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7
Q

amoebocyte

A

motile cell

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8
Q

collar cell

A

generate water currents and capture food in sponges

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9
Q

osculum

A

excretory structure in sponges

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10
Q

spicules

A

structural elements found in sponges

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11
Q

epidermis

A

outermost layer in sponges, cnidaria

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12
Q

how can sponges reproduce?

A

budding

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13
Q

Cnidaria symmetry

A

radial

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14
Q

Body makeup of cnidaria

A

true tissues, simple organs, no systems

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15
Q

Cnidarian are mostly

A

motile

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16
Q

How do cnidaria digest?

A

sac-like

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17
Q

Sessile

A

immobile

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18
Q

Polyp

A

a sessile cnidarian where a stalk holds the tentacles upward

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19
Q

Medusa

A

free-swimming where the tentacles dangle down

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20
Q

cnidocytes

A

stinging cells in cnidaria

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21
Q

nematocysts

A

stinging organelles in cnidaria

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22
Q

gastrodermis

A

the inner layer of cells in cnidarians that lines the gastrovascular cavity and is involved in digestion and absorption

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23
Q

mesoglea

A

hydrostatic skeleton that gives structure to cnidaria

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24
Q

Phylum Platyhelminthes

A

flatworms: tapeworms, flukes planarians

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25
Q

are Platyhelminthes free-living or parasitic

A

both

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26
Q

Platyhelminthes digestive and nervous system

A

incomplete digestive system, simple nervous system

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27
Q

Platyhelminthes are hermaphrodites which means they:

A

produces both sperm and egg cells

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28
Q

What type of symmetry do Platyhelminthes have?

A

Bilateral

29
Q

Are Platyhelminthes protostomes or deuterostomes?

A

protostomes

30
Q

pharynx

A

a feeding tube in platyhelminthes that take in and break down food

31
Q

scolex

A

head of a tapeworm that attaches to the host

32
Q

proglottid

A

body segments in platyhelminthes that allow it to reproduce

33
Q

Where does the blood fluke reproduce?

A

The human intestine

34
Q

Phylum Mollusca

A

bivalves, snails, slugs, squid, octopus

35
Q

are mollusca protostomes or deuterstomes

A

protostomes

36
Q

where do mollusca live

A

mostly marine, some terrestrial

37
Q

What 3 organs do all mollusca have?

A

Visceral mass, foot, mantle

38
Q

what type of digestive system do mollusca have?

A

complete

39
Q

what type of symmetry do mollusca have?

A

bilateral or nonsymmetrical

40
Q

The largest invertebrate is a mollusca: what is it?

A

Giant Squid

41
Q

Mollusca body type

A

soft and unsegmented

42
Q

3 types of gastropods

A

Nudibranchs, terrestrial snail, deer cowrie

43
Q

What is the animal group with the largest number of extinctions?

A

Gastropods

44
Q

Most threatened groups of mollusks

A

freshwater bivalves (including pearl muscles) and terrestrial gastropods (including pacific island snails)

45
Q

Phylum Nematoda

A

Roundworms: hook worms, pinworms, trichinella, elephantiasis, intestinal roundworms

46
Q

Nematoda body segmentation

A

nonsegmented

47
Q

Nematoda coelom or pseudocoelom

A

pseudocoelom

48
Q

Nematoda protostome or deuterostome

A

protostome

49
Q

Nematoda digestive system

A

complete

50
Q

Nematoda symmetry

A

bilateral

51
Q

Phylum Annelida

A

Earthworms, marine worms, leeches

52
Q

Annelida segmentation

A

segmented

53
Q

Annelida protostome or deuterostome

A

protostome

54
Q

Annelida coelom or pseudocoelom

A

coelom

55
Q

Where do annelida inhabit

A

freshwater, marine, or terrestrial

56
Q

Annelida Digestive System

A

complete

57
Q

Annelida symmetry

A

bilateral

58
Q

Systems of annelida

A

circular and nervous

59
Q

Setae

A

bristles that help annelids move and burrow

60
Q

Parapodia

A

in annelids that help with motion, excretion and respiration

61
Q

Phylum Arthropoda

A

Insects, crustaceans, spiders, centipedes, millipedes and mites

62
Q

What kind of development do Arthropoda undergo?

A

Protostome

63
Q

Where do arhtropoda inhabit?

A

marine, freshwater and terrestrial

64
Q

What is the largest phyla and what is the percentage of species it contains?

A

Arthropoda, 70-75%

65
Q

Arthropda key features

A

exoskeleton, segemented, complete and complex systems

66
Q

What type of symmetry do arthropods have?

A

Bilateral

67
Q

Metamorphosis

A

larva such as a caterpillar or maggot changes to an adult

68
Q

Entomology

A

study of insects

69
Q

Gregarious

A

Biology 2 (15 decks)

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