Cnidarians & Ctenophorans Flashcards Preview

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Flashcards in Cnidarians & Ctenophorans Deck (96):
1

What type of animals are most in the phylum Cnidaria?

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

2

Hydras are found where?

Freshwater

3

In the phylum Cnidaria all have what?

Arm-like tentacles

4

Cnidarian a have what kind of symmetry?

Radial

5

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

Both mouth and anus

6

The cnidarians have how many tissue layers?

2 (diploblastic)

7

The cnidarian has

An outer epidermis and inner gastro dermis

8

Cnidarians are either

Tubular or bell shaped

9

Between two cell layers that supports cnidarians

Jelly like mesoglea

10

Tentacles surround the

Mouth

11

Cnidarians are the only animal with

Cnidocytes (stinging cells)

12

The cnidocytes are found where?

The tentacles

13

Coiled, harpoon like stinger inside the cnidocytes that shoot out

Nematocysts

14

Cnidocytes contain

Poison to paralyze prey

15

Tentacles bring food into

The mouth

16

The inner gastrodermis secretes

Digestive juices into the gastro vascular cavity

17

The gastro vascular cavity

Digests food and circulates nutrients

18

Food is digested outside the cell

Extra cellular digestion

19

Cnidarians systems have a simple

Nerve net and sensory receptors

20

In Cnidarians muscles help in

Directional movement and capturing prey

21

Scyphozoans

Jelly fish

22

Anthozoans

Sea anemones, corals

23

Hydrozoans

Hydra

24

Cubozoa

Box jellies

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