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Bio 113 > The Metazoa Part 1 > Flashcards

The Metazoa Part 1 Flashcards

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Biology 101 flashcards
1
Q

Choanocytes line the body cavity of metazoans

A

False
Their body cavity is lined by endoderm cells

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2
Q

Principal body opening in metazoans is

A

The inhalant

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3
Q

Diploblastic body is attained by

A

Cnidarians

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4
Q

Cnidarian are at _____ level of organisation

A

Tissue level

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5
Q

Single body cavity which serves for ingestion and egestion in cnidarians is

A

The enteron

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6
Q

The mouth of cnidarians is surrounded by

A

Tentacles

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7
Q

Nematocysts in cnidarians serve for

A

Defence and food capture

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8
Q

Cnidarians are _______ symmetrical

A

Radially symmetrical

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9
Q

Polymorphism in cnidarians means that

A

The occur either as hydroid(polyp) or medusoid type

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10
Q

The nervous system of cnidarians is

A

An irregular network of cells

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11
Q

Production of colonial zooids in asexual reproduction is a feature of

A

Cnidarians

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12
Q

In cnidarians, sexual reproduction produces a cilliated larva known as

A

Planula larva

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13
Q

Polyp is the predominant stage while medusa is the simple stage in

A

Hydrozoa

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14
Q

Hydrozoa reproduce by

A

Alternation of generation of sexual and asexual phases of their life cycle

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15
Q

The largest class of cnidarians is

A

The class anthozoa

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16
Q

Exclusively marine cnidarians are

A

Class scyphozoa and anthozoa

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17
Q

Which class of cnidarians lack nematocysts

A

Scyphozoa

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18
Q

Nematocysts of anthozoa are present in

A

The endoderm

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19
Q

Nematocysts are present on the ectoderm of

A

Class scyphozoa

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20
Q

Which class of cnidarians occur only as polyps

A

Anthozoa

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21
Q

Polyp stage may be absent in

A

Class scyphozoa

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22
Q

Actinia/sea anemone and astrangia/coral are examples of

A

Class anthozoa

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23
Q

Hydra, obelia and physalia are examples of

A

Class hydrozoa

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24
Q

Aurelia/jellyfish and pelagia are examples of

A

Class scyphozoa

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25
Q

What are rhabdites

A

Mucus producing organ

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26
Q

Platyhelminths are called flatworms because

A

They are dorso-ventrically flattened

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27
Q

Features of higher animals that were first found in flatworms are

A

Cephalization
Bilateral symmetry
Triploblastic organisation
Organ-system organisation

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28
Q

Flatworm have body vascular and respiratory systems

A

False

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29
Q

Respiration and excretion in flatworms is mainly by

A

Diffusion

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30
Q

Flatworms possess central nervous system

A

True

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31
Q

Flatworms possess excretory and osmoregulatory system of

A

Branched protonephridials cells that end in flame cells

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32
Q

Flatworms are hermaphrodites

A

True

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33
Q

Phylum platyhelminthes is divided in 4 classes which are

A

Turbellaria
Monogenea
Trematoda
Cestoidea

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34
Q

They possess rhabdites.
This refers to

A

Class turbellaria

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35
Q

Free living platyhelminths found in aquatic habitat are

A

Class tubellaria

36
Q

________ are mostly ectoparasites of fish, turtles and amphibians

A

Class monogenea

37
Q

Suckers are rarely present in

A

Class turbellaria

38
Q

The body of class ______ is covered by a complex tegument

A

Class trematoda

39
Q

They have complex life cycles involving intermediate hosts.
They refers to

A

Class trematoda

40
Q

Dugesia is an example of

A

Class turbellaria

41
Q

Class turbellaria lack cuticle

A

True

42
Q

Class _______ have a ciliated outer covering to the body

A

Class turbellaria

43
Q

Class _______ have simple life cycles and have only one host

A

Class monogenea

44
Q

The large posterior attachment structure of class monogenea is called

A

Haptor

45
Q

Polystoma sp and diplozoon are examples of

A

Class monogenea

46
Q

_________ are parasitic and their adults lack cilia

A

Class trematoda

47
Q

Class trematoda are divided into 2 sub classes

A

Aspidogastrea
Digenea

48
Q

A.parasite of fresh water clams is

A

Aspidogaster conchicola

49
Q

Subclass aspidogastrea have _____ host

A

One host which may be a mollusc or cold blooded vertebrate

50
Q

They have a large ventral sucker called holdfast which is usually made up of many suckered or several alveoli. This refers to

A

Subclass aspidogastrea

51
Q

Rondella and rugogaster are examples of which sub class of trematoda

A

Subclass aspidogastrea

52
Q

They are endoparasites of all groups of vertebrates. They refers to

A

Subclass digenea

53
Q

Suckers present in subclass digenea are usually ______

A

2
Oral and ventral suckers

54
Q

Subclass digenea have ________ hosts in their life cycle

A

2 or more

55
Q

Fasciola hepatica is an example of

A

Subclass digenea

56
Q

Class ______ are commonly called tapeworms

A

Class Cestoidea

57
Q

Each segment of tapeworms is called

A

Proglottid

58
Q

The head region of tapeworms which bears hooks and suckers for attachments is called

A

Scolex

59
Q

The young proglottids of tapeworms are without complement of

A

Reproductive system

60
Q

_________ segments of tapeworms are gravid and contain ripe eggs

A

Posterior segment

61
Q

Tapeworms have no mouth and no digestive system

A

True

62
Q

The body of tapeworms is covered by

A

Thick cuticle

63
Q

The life cycle of tapeworms is

A

Complex and involves intermediate hosts

64
Q

The ________ proglottid are mature and have full complement of reproductive systems

A

Middle proglottid

65
Q

There is cillia in adult tapeworms

A

False
The adults have no cillia

66
Q

Taenia saginata is also known as

A

Beef tapeworm

67
Q

Pork tapeworm is called

A

Taenia solium

68
Q

Phylum nematoda are commonly referred to as

A

Round worms

69
Q

Body of nematodes is covered by

A

An elastic cuticle

70
Q

Nematodes have no cillia in any part of their body

A

True

71
Q

Phylum __________ are elongated, cylindrical, unsegmented, psuedocoelomate,bilaterally symmetrical and triploblastic

A

Phylum nematoda

72
Q

Phylum nematodes have only _________ muscles

A

Longitudinal muscles

73
Q

Nematodes are dioecious meaning that

A

Their sexes are seperate

74
Q

Nematodes exhibits sexual dimorphism which means that

A

The males are smaller that the females

75
Q

Alimentary canal of nematodes is a __________ tube from mouth to anus

A

Straight tube

76
Q

Phylum nematoda is divided into 2 classes

A

Class adenophorea/aphasmidia
Class secernentea/phasmidia

77
Q

Excretory system of _____ is well developed

A

Class secernentea

78
Q

Trichus sp is an example of which class of nematodes

A

Adenophorea

79
Q

Males of class ________ have one spicule

A

Class adenophorea

80
Q

Males of class secernentea have _______ spicules

A

2

81
Q

Rhabditis, wucheria, onchorea sp are examples of

A

Class secernentea

82
Q

What are phasmids

A

Caudal sensory organs in nematodes

83
Q

They lack phasmids is referring to ________ class of nematodes

A

Class adenophorea

84
Q

The only free living platyhelminth is

A

Class turbellaria

85
Q

Which classes of platyhelminths are parasites

A

Monogenea
Trematoda
Cestoidea

Bio 113 (5 decks)

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