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VZOO LEC EXAM > Lesson 5c. Radiate Animals > Flashcards

Lesson 5c. Radiate Animals Flashcards

1
Q

Radiate animals include two phylum

A

Phylum cnidaria
Phylum ctenophora

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2
Q

Phyla characterized by radial or biradial symmetry and their body are arranged around a central axis

A

Radiate animals

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3
Q

Body can be divided into mirrored halves only along 2 planes through central axis

A

Biradial symmetry

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4
Q

Both have two well-developed germ layers

A

Endoderm and ectoderm

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5
Q

Internal body cavity with a single opening (mouth and anus)

A

Gastrovascular cavity

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6
Q

Simplest form of true nerve cells

A

Protoneurons

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7
Q

They have the simplest form of sense organs

A

Radiates

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8
Q

Maintain equilibrium and ocelli

A

Statocysts

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9
Q

Radiates can move by ____ or _____

A

Muscular contractions
Ciliary comb plates

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10
Q

3 classes of phylum Cnidaria

A

Class hydrozoa
Class scyphozoa
Class anthozoa

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11
Q

All are aquatic and radial symmetry, sessile or floating

A

Phylum Cnidaria

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12
Q

Type of body form that is tubular body with tentacles
Ex: hydra

A

Polyp

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13
Q

Type of body form that is bell shaped and free swimming
Ex: jellyfish

A

Medusa

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14
Q

This has representatives like hydra, obelia, Portuguese man-of-war

A

Class hydrozoa

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15
Q

Class hydrozoa: a medusa form has a ______( ring of tissue that is found at the base of the tentacles)

A

Velum

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16
Q

They are freshwater hydrozoa, sessile polyps, lives underside of aquatic leaves, 16 species found in North America

A

Hydra

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17
Q

Length of 25-30 mm with cylindrical tube with stalk like end and an attachment end

A

Hydra

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18
Q

Attachment end that contains gland cells to allow adhesion

A

Basal disk

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19
Q

It has 6-10 tentacles that are hollow and extendable and contain nematocyst (stinging cells)

A

Hydra

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20
Q

Outer layer or epidermis; contains 5 types of cells

A

Ectoderm

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21
Q

Cell that is responsible for muscular contractions

A

Epitheliomuscular cells

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22
Q

Undifferentiated stem cells that become most other types of cells

A

Interstitial cells

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23
Q

Cell that secretes an adhesive substance that aids in the attachment process

A

Gland cells

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24
Q

Cell that contain nematocyst

A

Cnidocytes

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25
Q

Cell with multipolar neurons

A

Nerve cells

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26
Q

Gastrodermis; inner layer that contains muscular, gland, and interstitial cells

A

Endoderm

27
Q

Jelly-like substance found b/w ectoderm and endoderm

A

Mesoglea

28
Q

Floats and moves by somersaulting motion

A

Locomotion of hydra

29
Q

When disturbed, it will contract and form a small ball

A

Response of hydra

30
Q

It has no brain, through budding or regeneration, occurs when temporary gonads develop in the autumn

A

Hydra

31
Q

It means cup animal

A

Scyphozoa

32
Q

Representative of class scyphozoa

A

Jellyfish (aurelia)

33
Q

_____ is for sexual reproduction. Zygote develops into a ____ which swims around and then settles to form the ____

A

Medusa form
Planula larva
Polyp form

34
Q

It has Tentacles of the medusa have nematocysts that give humans painful stings

A

Jellyfish

35
Q

All jellyfish contain a

A

Toxin

36
Q

Considered to be more dangerous

A

Box jellies

37
Q

Considered most deadly of the jellyfish

A

Irukandji

38
Q

1 cm³ (largest) , many are 5mm or less
They are in Australia’s coast

A

Irukandji

39
Q

Means flower animal

A

Class anthozoa

40
Q

Representative: sea anemone, coral

A

Class anthozoa

41
Q

Class that Lack medusa stage
All marine (deep and shallow water)
Solitary/colonial

A

Anthozoa

42
Q

Contain large gastrovascular cavity that is separated by division called

A

Septa

43
Q

Inward projections of the body wall

A

Septa

44
Q

Polyps of sea anemone are _____ and ___ than hydrozoan polyps

A

Larger
Heavier

45
Q

Attach to shells, rocks, or timber by pedal discs. Some in mud/sand

A

Sea anemone

46
Q

Sea A: what surrounds the flat oral disc

A

Crown of tentacles

47
Q

Sea a: this leads into a pharynx

A

Slit-shaped mouth

48
Q

Sea a: it is divided into six pairs of primary septa

A

Gastrovascular cavity

49
Q

Sea anemone have ___ that protects them from triggering nematocyst

A

Skin mucus

50
Q

Display only the polyp body form
Has large economic value

A

Corals

51
Q

Suffering from global warming and high concentrations of carbon dioxide

A

Coral reefs

52
Q

What remains when coral dies?
Produce coral reefs and can also be used to create Jewelry?

A

Hard skeleton
Skeleton

53
Q

5 characteristics of ctenophora

A

Marine found in warm waters
Formed from 8 rows of comblike plate in locomotion
Radial and biradial symmetry
Endoderm, ectoderm, mesoglea between
No nematocyst, have colloblasts

54
Q

Adhesive cells that are used to capture prey

A

Colloblasts

55
Q

Class that Has tentacles that may or may not have sheaths into which they retract

A

Class tentacula

56
Q

Some have flattened tentacles for creeping

A

Class tentacula

57
Q

Body is 1.5-2 cm and has sense organ called _____ near the mouth opening

A

Class tentacula
Statocyst

58
Q

8 equally spaced bands called_____
Long fused cilia called ______
- movement: wavelike beating of cilia

A

Comb rows
Comb plate

59
Q

It has two tentacles (very long and extensible) , the surface of the tentacles are covered with colloblasts (glue cells)

A

Class tentacula

60
Q

Gastrovascular system of class tentacula consists of

A

Mouth, pharynx, stomach, gastrovascular canals

61
Q

Digestion of class tentacula is both _____
Undigested waste leaves the body through ____

A

Extracellular and intracellular
2 anal canals

62
Q

This both occurs through the body surface in class tentacula

A

Respiration and excretion

63
Q

Representative of class tentacula

A

Representative: Pleurobrachia

VZOO LEC EXAM (5 decks)

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