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Animal Biology > Porifera, Cnidaria, Ctenophora > Flashcards

Porifera, Cnidaria, Ctenophora Flashcards

1
Q

What spicules does the Porifera class Calcera have?

A

Calcium carbonate spicules

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2
Q

Porifera Calcera can be any of the three body system types, True or False?

A

True, they can be asconoid, syconoid, or leuconoid

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3
Q

Most Porifera Calcera are what shapes?

A

they are small and Vase-shaped or tubular.

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4
Q

What spicules does the Porifera class, Hexactinellida have?

A

Silica spicules

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5
Q

What is left behind when Porifera Hexactinellida’s living cells die?

A

Glass-like lattice

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6
Q

What body system types can Hexactinellida exhibit?

A

Can be leuconoid or syconoid.

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7
Q

What spicules can the Porifera class Demospongiae have? (long answer)

A

Silica, sponging spicules, or both!

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8
Q

What body system do all Demospongiae exhibit?

A

All are leuconoid!

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9
Q

SIZE OF DEMOSPONGIAE??

A

Many are Large!

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10
Q

Demospongiae bonus facts!

A

Soft sponging like bath sponges. Have freshwater varieties, the largest of the Porifera class.

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11
Q

Sessile means?

A

fixed in one place, immobile

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12
Q

What do filter feeders do?

A

Strain food particles from the water

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13
Q

The cellular level of organization in Porifera?

A

specialized cells, no true tissues or organs. (single germ layer)

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14
Q

What is the inner meshwork of Porifera made of?

A

microscopic spicules or collagen fibers or BOTH!

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15
Q

What does the inner meshwork function as?

A

functions as an internal skeleton

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16
Q

How many cell types does Porifera have and how are they arranged?

A

4, arranged around a system of canals and pores.

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17
Q

Define Mesohyl

A

gelatinous mix in which sponge cells are embedded.

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18
Q

Describe leuconoid body system:

A

Largest system, most complex, small chambers lined with choanocytes.

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19
Q

Describe syconoid body system:

A

Bigger than asconoids, tubular single osculum, tube shaped, Lining is folded
outward canals lined
with choanocytes

20
Q

Describe asconoid body system:

A

Tube-shaped, don’t get big (smallest of the 3), one internal cavity lined with choanocytes.

21
Q

What is the cellular organization of the Phylum Cnidaria?

A

Tissue level: specialized cells, tissues, lacking organs. (2 germ layer)

22
Q

What are Cnidocytes?

A

specialized stinging cells.

23
Q

How many life phases do Cnidarians have and what are they called?

A

2 distinct phases; medusa and polyp.

24
Q

What is a Hydrostatic skeleton and do Cnidarians have it?

A

flexible skeleton supported by fluid pressure, yes Cnidarians have it.

25
Q

Polyp form

A

anchored down, mouth up

26
Q

Medusa form

A

Free-floating, mouth down

27
Q

Name characteristics of Hydrozoa (1 of 4)

A

polyp form dominant

28
Q

Characterisitics of hydrozoa (2 of 4)

A

In medusa form. bell projects inward to form a velum’

29
Q

Charact. of Hydrozoa (3 of 4)

A

most are colonial and have distinct polyp & medua phases.

30
Q

Charact. of Hydrozoa (4 of 4)

A

Have specialized polyps for prey capture, feeding, and reproduction.

31
Q

Class Scyphozoa characteristic (1 of 4)

A

Medusa form is dominant

32
Q

Class Scyphozoa charact. (2 of 4 )

A

No velum present on bell of medusa

33
Q

Scyphozoa charact. (3 of 4)

A

Margin of bell is scalloped

34
Q

Scyphozoa charact. (4 of 4)

A

Four gastric pouches connected to radial canals and a ring canal (think like flowers off of spongebob)

35
Q

Class Cubozoa characterisitcs (1 of 4)

A

Medusa form is dominant

36
Q

Cubozoa characteristics (2 of 4 )

A

Bell is a square in cross-section (thats why its box jellyfish)

37
Q

Cubozoa cubozoa cubozoa characteristics (3 of 4)

A

Has a velarium, NOT a velum.

38
Q

Cubozoa characteristic (4 of 4)

A

Flattened pedalium on each tentacle.

39
Q

Class Anthozoa characteristics (all 3 of them)

A

Flower-like appearance, Polyp form is dominant, and has NO MEDUSA STAGE.

40
Q

What phase do Ctenophora exhibit?

A

Medusa phase only

41
Q

cool light related thing about ctenophora?

A

they are iridescent and luminescent

42
Q

How many rows of plates do Ctenophora have

A

8

43
Q

What are on the plates of Ctenophora and what are they used for?

A

Cilia! for locomotion!

44
Q

Do they have nematocytes?

A

NO! but they can incorporate them from Cnidarian prey for their own self defense! thats super cool!

45
Q

Ctenophora have statocytes, what are statocytes used for?

A

balance

Animal Biology (10 decks)

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