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Organismic Biology Lab > Lab 4 - Porifera and Cnidaria > Flashcards

Lab 4 - Porifera and Cnidaria Flashcards

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1
Q

What organisms are in the phylum porifera?

A

sponges

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2
Q

What level of organization are porifera?

A

cellular

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3
Q

How many germ layers do porifera have?

A

none

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4
Q

What kind of body cavity do porifera have?

A

Acoelom

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5
Q

What type of symmetry do porifera have?

A

asymmetry

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6
Q

How do porifera get food?

A

filter feeding - phagocytosis

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7
Q

What kind of support system do porifera have?

A

no formal support system

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8
Q

Porifera - locomotion

A

sessile

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9
Q

What kind of circulation do porifera have?

A

none

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10
Q

What kind of sensory structures do porifera have?

A

none

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11
Q

How do porifera excrete?

A

diffusion

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12
Q

How do porifera reproduce?

A

sexual and asexual

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13
Q

What are the classes of porifera?

A

hexactinellida, demospongiae, and calcarea

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14
Q

Osculum

A

large opening on top where water exits the sponge

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15
Q

Ostia

A

pores where water enters the sponge

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16
Q

Spongocoel

A

internal cavity of the sponge

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17
Q

Choanocytes

A

flagellated cells that filter food from the water coming into the sponge

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18
Q

Amoebocytes

A

interior of the sponge - aid in digestion, secretes spicules, and aids in reproduction

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19
Q

Pinacytes

A

outer surface - maintain structure and size

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20
Q

What are the three types of sponges?

A

Asconoid, sysonoid, and leuconid

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21
Q

Asconoid

A

small and tube shaped

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22
Q

Syconoid

A

tube-like with a complex canal system

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23
Q

Leuconoid

A

largest and most complicated

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24
Q

Are porifera monoecious or dioecious ?

A

monoecious

25
Q

What is the difference between monoecious and dioecious?

A

mono - one house (has both eggs and sperm)
dio - two houses (has either eggs or sperm

26
Q

What organisms are in phylum cnidaria?

A

coral, jellyfish, and hydra

27
Q

What level of organization are cnidaria?

A

tissue

28
Q

How many germ layers do cnidaria have?

A

2 - diploblastic

29
Q

What kind of body cavity do cnidaria have?

A

Acoelom

30
Q

What kind of symmetry do cnidaria have?

A

radial

31
Q

Cnidaria - digestion

A

gastrovascular cavity

32
Q

What kind of support do cnidaria have?

A

hydrostatic skeleton

33
Q

Cnidaria - locomotion

A

simple muscle contraction

34
Q

What kind of circulation do cnidaria have?

A

none

35
Q

What kind of sensory structures do cnidaria have?

A

simple nerve net

36
Q

How do cnidaria excrete?

A

diffusion

37
Q

How do cnidaria reproduce?

A

sexual or asexual

38
Q

Where are cnidaria found?

A

aquatic

39
Q

What are the classes of cnidaria?

A

Hydrozoa, cubozoa, scyphozoa, staurozoa, anthozoa

40
Q

What are the two body forms of cnidaria?

A

polyp (anthozoa, hydrozoa) and medusa (scyphozoa)

41
Q

Hydrozoa

A

hydra, fire corals

42
Q

Are hydrozoa polyp or medusa dominant?

A

polyp

43
Q

Scyphozoa

A

true jellyfish

44
Q

Are syphozoa polyp or medusa dominant?

A

medusa

45
Q

Anthozoa

A

corals, anemones

46
Q

Are anthozoa polyp or medusa dominant?

A

they only have polyp stages

47
Q

Cnidaria - mesoglea

A

noncellular, gelatin layer

48
Q

Epidermis

A

outer germ layer with cnidocytes

49
Q

Gastrodermis

A

inner cell lining of the gastrovascular cavity

50
Q

How do cnidaria protect themselves?

A

with nematocysts within cnidocytes

51
Q

Nematocysts

A

specialized stinging cells

52
Q

cnidocytes

A

hold nematocysts

53
Q

Are cnidaria monoecious or dioecious?

A

both

54
Q

Where are the gonads formed in cnidaria?

A

gastrodermis

55
Q

Cnidaria -What is the hair-like trigger for the nematocysts?

A

cnidocil

56
Q

Planula

A

free swimming larvae

57
Q

How does a planula polyp become a medusa?

A

By strobilation

58
Q

How does water flow through porifera?

A

Through the ostia, out through the spongocoel, then out through the osculum

Organismic Biology Lab (16 decks)

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