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Zoo 201 > Cnidaria > Flashcards

Cnidaria Flashcards

1
Q

What is the grade of Cnidaria?

A

Eumetazoa

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2
Q

What classes make up the phylum Cnidaria?

A

Hydrozoa, Scyphozoa and Anthozoa

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3
Q

Hydrozoa are made up of…

A

Hydra, Physalia and Obelia

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4
Q

Scyphozoa are made up of…

A

Aurelia

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5
Q

Anthozoa are made up of…

A

Metridium

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6
Q

Which two genuses of Hydrozoa are colonial?

A

Physalia and Obelia

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7
Q

What two germ layers do Cnidarians possess?

A

epidermis and gastrodermis

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8
Q

The name of the jelly-like substance between the two germ layers is called

A

mesoglea

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9
Q

The ability to have two body morphs is referred to as

A

bimorphic

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10
Q

The polyp body morph is

A

sessile (attached) and benthic (at the bottom)

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11
Q

The medusa body morph is

A

floating and planktonic (floats along the H2O column)

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12
Q

The kind of body symmetry that Cnidarians possess is

A

radial

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13
Q

The digestive systems of Cnidarians is

A

incomplete with no cephalization

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14
Q

Stinging cells found in Cnidarians are called

A

cnidocytes

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15
Q

Stinging organelles found in Cnidarians are called

A

nematocysts. They are found coiled within cnidocytes

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16
Q

What causes nematocysts to fire?

A

tactile and chemical stimulation

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17
Q

Why are nematocysts used?

A

for prey capture and self-defense

18
Q

The colonial Portuguese Man of War is an example of which Cnidarian genus?

A

Physalia

19
Q

Gastrozoids in Physalia are which kind of polyp? What are they called in Obelia?

A

feeding polyps hydranths

20
Q

Ganozoids in Physalia are which kind of polyp? What are they called in Obelia?

A

reproductive polyps gogangium

21
Q

Dactylozoids in Physalia are which kind of polyp?

A

prey capture polyps due to their tentacles

22
Q

What is the purpose of the septa in sea anemone?

A

it is the internal partition in the organism and increases surface area for digestion

23
Q

Metridium examples are

A

corals and sea anemones

24
Q

Pictured is which stage of the Aurelia life cycle?

A

Planula Larva

25
Q

Pictured is which stage of Aurelia?

A

Scyphistoma

26
Q

Pictured is which stage of the Aurelia life cycle?

A

Strobila

27
Q

Pictured is which stage of the Aurelia life cycle?

A

Ephyra

28
Q

Pictured is which stage of the Aurelia life cycle?

A

Adult Medusa

29
Q

Pictured is…

A

Physalia tentacles

30
Q

Pictured is…

A

Hydra budding

31
Q

Pictured is…

A

Hydra gonads

32
Q

Which stages of the Aurelia life cycle are benthic?

A

scyphistoma and strobila

33
Q

Which stages of the Aurelia life cycle are planktonic?

A

planula larva, ephyra and adult medusa

34
Q

What are the different members of the Physalia colony?

A

the feeding polyps (Gastrozoids)

the reproductive polyps (Gonozoids)

the polyps with tentacles (Dactylozoids)

35
Q

Name the numbered structures.

A
  1. Tentacle
  2. ectoderm (epidermis)
  3. endoderm (gastrodermis)
  4. gullet
  5. primary mesentery
  6. pores
  7. gastrovascular cavity
  8. mesenterie filament
  9. acontia
  10. secondary mesentery
  11. tertiary mesentery
  12. gonads
  13. body wall
  14. basal disks
36
Q

Name the numbered structures

A
  1. Gastrodermis
  2. Epidermis
  3. Mesoglea
  4. Mouth
  5. Hypostome
  6. Basal disk
  7. Tentacles
  8. Ovary
  9. Testis
  10. Gastrovascular cavity
  11. Bud
37
Q

Name the numbered structures

A
  1. Gastrodermis
  2. Epidermis
  3. Mesoglea
  4. Gastrovascular cavity
  5. Nutritive Muscular Cells
  6. Food particle being engulfed
  7. Gland cell
  8. Epitheliomuscular Cells
  9. Interstital Cells
  10. Cnidoblasts/Cnidocytes
  11. Circular Muscle fibril
  12. Longitudinal Muscle fibril
  13. Neurons
38
Q

Name the numbered structures

A
  1. Epidermis (ectoderm)
  2. Coelenteron
  3. Mesoglea
  4. Gastrodermis (endoderm)
39
Q

Name the numbered structures

A
  1. Coelenteron
  2. Testes
  3. Epidermis (ectoderm)
  4. Gastrodermis (endoderm)
40
Q

Which gender of Hydra is pictured?

Name the numbered structures.

A

male

  1. Tentacles
  2. Testes
41
Q

Which gender of Hydra is pictured?

Name the numbered structures.

A

female

  1. Tentacles
  2. Ovary
  3. Basal disk (foot)
42
Q

Name the numbered structures.

A
  1. Tentacles
  2. Bud
  3. Hypostome
  4. Basal disc (foot)

Zoo 201 (5 decks)

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