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Cnidarians & Ctenophorans Flashcards

(96 cards)

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1
Q

What type of animals are most in the phylum Cnidaria?

A

Marine (jellyfish, coral, sea anemones, Portuguese man of war)

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2
Q

Hydras are found where?

A

Freshwater

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3
Q

In the phylum Cnidaria all have what?

A

Arm-like tentacles

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4
Q

Cnidarian a have what kind of symmetry?

A

Radial

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5
Q

Cnidarians have a single gut (gastrovascular cavity) that has a single opening that serves as what?

A

Both mouth and anus

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6
Q

The cnidarians have how many tissue layers?

A

2 (diploblastic)

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7
Q

The cnidarian has

A

An outer epidermis and inner gastro dermis

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8
Q

Cnidarians are either

A

Tubular or bell shaped

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9
Q

Between two cell layers that supports cnidarians

A

Jelly like mesoglea

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10
Q

Tentacles surround the

A

Mouth

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11
Q

Cnidarians are the only animal with

A

Cnidocytes (stinging cells)

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12
Q

The cnidocytes are found where?

A

The tentacles

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13
Q

Coiled, harpoon like stinger inside the cnidocytes that shoot out

A

Nematocysts

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14
Q

Cnidocytes contain

A

Poison to paralyze prey

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15
Q

Tentacles bring food into

A

The mouth

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16
Q

The inner gastrodermis secretes

A

Digestive juices into the gastro vascular cavity

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17
Q

The gastro vascular cavity

A

Digests food and circulates nutrients

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18
Q

Food is digested outside the cell

A

Extra cellular digestion

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19
Q

Cnidarians systems have a simple

A

Nerve net and sensory receptors

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20
Q

In Cnidarians muscles help in

A

Directional movement and capturing prey

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21
Q

Scyphozoans

A

Jelly fish

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22
Q

Anthozoans

A

Sea anemones, corals

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23
Q

Hydrozoans

A

Hydra

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24
Q

Cubozoa

A

Box jellies

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25
In the scyphozoan what is the dominant body form?
Medusa
26
The scyphozoans go through
A small polyp stage during their life cycle
27
Scyphozoans have
Stinging tentacles
28
Jellyfish may live
Close to the shore or the open ocean
29
Brightly colored and resemble flowers Solitary polyps Feed on invertebrates and fish
Sea anemones
30
Sea anemones have a mutualistic relationship with
Various species of anemone fish
31
The fish receive protection from living in the anemone and the anemone recieved
Food from the fish
32
Most are colonial
Corals
33
Hard corals build
Limestone case
34
Corals live as
Polyps in their case
35
Most corals have a symbiotic relationship with
Zooanthellae (dinoflagellate algae)
36
The algae live inside the coral providing
Food and helping to eliminate waste through photosynthesis
37
Corals grow best in
Tropical well lit and clear water
38
Many also have algae inside them
Anemones
39
Hard coral are the most ecologically significant thanks to
The massive calcium carbonate reefs they build
40
Sensitive to runoffs, fertilizers, etc.
Corals
41
When a coral is stressed and becomes colorless
Coral bleaching
42
Coral bleaching is a sign of
A diseased and dying colony
43
Soft coral and sea fans grow into
Treelike structures built on protein skeletons
44
NOT reef builders
Corals
45
Exist only as polyps
Hydra
46
Reproduce by budding
Hydra
47
Fresh water only
Hydra
48
Move by somersaulting with tentacles
Hydrozoans
49
Form resistant zygotes when the environment is bad
Hydra
50
Hydra
Portuguese man of war
51
Portuguese man of war are
Colonia
52
Portuguese man of war contain
Tentacles
53
In hydra polyps
In colony feed
54
Portuguese man of war has
Has filled air float
55
Most hydrozoans alternate
Polyp and medusa forms
56
Larva
Planula
57
Called com jellies | All marine
Ctenophoran
58
There are how many species in ctenophoran
Approximately 100
59
Ctenophorans may be
Spherical elongated or Ovid
60
Appear to be bioluminescent
Ctenophores
61
Ctenophoran have
Radial symmetry
62
How many species does the phylum Cnidaria contain?
About 9,000
63
Have 8 plates of fused cilia that resemble combs
Ctenophoran
64
Ctenophoran move by
Beating cilia
65
Most f the body is jelly-like mesoglea
Ctenophoran
66
Ctenophoran body and tentacles covered with
Sticky mucus to catch prey
67
Has numerous tentacles and is bell shaped
Moon jelly
68
Has 2 tentacles and 8 plates of fused cilia
Comb jelly
69
Have the same 2 layers of dermal tissue, have mesoglea, have a nervous system and muscle system
Both the moon jelly and comb jelly
70
What are the 4 classes of phylum Cnidaria?
Hydrozoa Scyphozoa Cubozoa Anthozoa
71
What type of symmetry is found in cnidarians?
Radial or biradial
72
What are the two basic body forms or styles of Cnidarians?
Polyps and medusae
73
What is the coelenteron?
A single opening that serves as both a mouth and anus; extensible tentacles usually encircling the mouth or oral region
74
What is the polyp form found in Cnidarians body structure?
Tubular body with a mouth at one end surrounded by tentacles
75
Where are the tentacles located in Cnidarians? (Polyp)
By the mouth
76
Where is the mouth located in Cnidarians? (Polyp)
The end of the polyp
77
The medusa body form in Cnidarians body structure
Body parts arranged in fours (tetramerous symmetry)
78
Where are the tentacles located in the medusa body form of Cnidarians?
Extend from the rim of the umbrella margin
79
Where is the mouth located medusa form Cnidarians
Usually centered on the concave side (oral surface)
80
A tiny capsule composed of material similar to chitin which contains a coiled thread
Nematocyst
81
Cell that secretes and encloses the nematocyst
Cnidocyte
82
A trigger like structure of the cnidocyte
Cnidocil
83
The primitive nervous system of Cnidarians
Nerve net
84
Some Cnidarians contain an extension found in the oral surface that contains the mouth called
Manubrium
85
What type of skeleton do Cnidarians contain?
Hydrostatic skeleton
86
A gelatinous or jelly like layer which lies between the epidermis and gastrodermis and adheres to both layers
Mesoglea
87
How do hydra and sea anemone move about on the sea floor?
Gliding in their basal discs aided by mucus secretions
88
What two types of digestion occur in Cnidarians?
Extra cellular and intracellular
89
In sexual reproduction where do most Cnidarians she's their gametes?
Directly into the water
90
The embryo characteristically develops into a free swimming planula larva
Planula
91
Most common type of asexual reproduction in Cnidarians
Budding
92
How many types of Portuguese man of war are there?
3: dactylozooids, gastro zooids, gonozooids
93
The true jellyfish "Aurelia" are found in which class?
Scyphozoans
94
What is the dominant body form of the jellyfish?
Medusae
95
What is the manubrium on jellyfish
An extension of the mouth (throat like)
96
Scyphozoans are
Dioecious

Marine Science (12 decks)

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