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Bio 113 > The Metazoa Part 1 > Flashcards

The Metazoa Part 1 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
What are rhabdites
Mucus producing organ
26
Platyhelminths are called flatworms because
They are dorso-ventrically flattened
27
Features of higher animals that were first found in flatworms are
Cephalization Bilateral symmetry Triploblastic organisation Organ-system organisation
28
Flatworm have body vascular and respiratory systems
False
29
Respiration and excretion in flatworms is mainly by
Diffusion
30
Flatworms possess central nervous system
True
31
Flatworms possess excretory and osmoregulatory system of
Branched protonephridials cells that end in flame cells
32
Flatworms are hermaphrodites
True
33
Phylum platyhelminthes is divided in 4 classes which are
Turbellaria Monogenea Trematoda Cestoidea
34
They possess rhabdites. This refers to
Class turbellaria
35
Free living platyhelminths found in aquatic habitat are
Class tubellaria
36
________ are mostly ectoparasites of fish, turtles and amphibians
Class monogenea
37
Suckers are rarely present in
Class turbellaria
38
The body of class ______ is covered by a complex tegument
Class trematoda
39
They have complex life cycles involving intermediate hosts. They refers to
Class trematoda
40
Dugesia is an example of
Class turbellaria
41
Class turbellaria lack cuticle
True
42
Class _______ have a ciliated outer covering to the body
Class turbellaria
43
Class _______ have simple life cycles and have only one host
Class monogenea
44
The large posterior attachment structure of class monogenea is called
Haptor
45
Polystoma sp and diplozoon are examples of
Class monogenea
46
_________ are parasitic and their adults lack cilia
Class trematoda
47
Class trematoda are divided into 2 sub classes
Aspidogastrea Digenea
48
A.parasite of fresh water clams is
Aspidogaster conchicola
49
Subclass aspidogastrea have _____ host
One host which may be a mollusc or cold blooded vertebrate
50
They have a large ventral sucker called holdfast which is usually made up of many suckered or several alveoli. This refers to
Subclass aspidogastrea
51
Rondella and rugogaster are examples of which sub class of trematoda
Subclass aspidogastrea
52
They are endoparasites of all groups of vertebrates. They refers to
Subclass digenea
53
Suckers present in subclass digenea are usually ______
2 Oral and ventral suckers
54
Subclass digenea have ________ hosts in their life cycle
2 or more
55
Fasciola hepatica is an example of
Subclass digenea
56
Class ______ are commonly called tapeworms
Class Cestoidea
57
Each segment of tapeworms is called
Proglottid
58
The head region of tapeworms which bears hooks and suckers for attachments is called
Scolex
59
The young proglottids of tapeworms are without complement of
Reproductive system
60
_________ segments of tapeworms are gravid and contain ripe eggs
Posterior segment
61
Tapeworms have no mouth and no digestive system
True
62
The body of tapeworms is covered by
Thick cuticle
63
The life cycle of tapeworms is
Complex and involves intermediate hosts
64
The ________ proglottid are mature and have full complement of reproductive systems
Middle proglottid
65
There is cillia in adult tapeworms
False The adults have no cillia
66
Taenia saginata is also known as
Beef tapeworm
67
Pork tapeworm is called
Taenia solium
68
Phylum nematoda are commonly referred to as
Round worms
69
Body of nematodes is covered by
An elastic cuticle
70
Nematodes have no cillia in any part of their body
True
71
Phylum __________ are elongated, cylindrical, unsegmented, psuedocoelomate,bilaterally symmetrical and triploblastic
Phylum nematoda
72
Phylum nematodes have only _________ muscles
Longitudinal muscles
73
Nematodes are dioecious meaning that
Their sexes are seperate
74
Nematodes exhibits sexual dimorphism which means that
The males are smaller that the females
75
Alimentary canal of nematodes is a __________ tube from mouth to anus
Straight tube
76
Phylum nematoda is divided into 2 classes
Class adenophorea/aphasmidia Class secernentea/phasmidia
77
Excretory system of _____ is well developed
Class secernentea
78
Trichus sp is an example of which class of nematodes
Adenophorea
79
Males of class ________ have one spicule
Class adenophorea
80
Males of class secernentea have _______ spicules
2
81
Rhabditis, wucheria, onchorea sp are examples of
Class secernentea
82
What are phasmids
Caudal sensory organs in nematodes
83
They lack phasmids is referring to ________ class of nematodes
Class adenophorea
84
The only free living platyhelminth is
Class turbellaria
85
Which classes of platyhelminths are parasites
Monogenea Trematoda Cestoidea

Bio 113 (5 decks)

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