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Animalia > CNIDARIA > Flashcards

CNIDARIA Flashcards

1
Q

cnidaria is also called

A

coelenterata

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2
Q

their two main features

A

nematocysts and polymorphism

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3
Q

which give rise to nematocysts

A

cnidocytes

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4
Q

tentacles are present around which structures

A

mouth and body

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5
Q

ectoderm give rise to cnidocytes which give rise to

A

nematocysts

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6
Q

size range

A

microscopic hydra to 2 meter long branchioceranthus

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7
Q

branchioceranthus size

A

about 2 meters

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8
Q

hydra can be seen by

A

microscope

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9
Q

habitat

A

aquatic

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10
Q

food source

A

carnivores

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11
Q

form of life

A

sessile, motile, and colonial

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12
Q

sessile cnidaria example

A

hydra, obelia, sea anemone

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13
Q

motile

A

jelly fish

aurelia- medusae are dominant and polyps are reduced

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14
Q

example of colonial cnidaria

A

obelia, physalia, vellela

saray l waly

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15
Q

symmetry

A

radiata

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16
Q

germ layers

A

two layers and mesoglea

17
Q

organs are

A

present byt organ system is absent

18
Q

which cells are specialized for digestion of food
1. ectodermal
2. endodermal

A

endodermal cells `

ecto give rise to cnidocytes

19
Q

the digestive cavity is called

A

enteron/ gastrovascuar cavity

one openng is present

20
Q

branchioceranthus is which polyp

A

hydrozoan

21
Q

how many zooids are present

A

main two wesay 5 are possible

22
Q

polyps and medusae role

A

nutritive and reproduction respectively

23
Q

characteristics of medusae

form of life

A

motile in nature
DIPLOID
reproductive role
have gonads
produce gamets
diploid in nature

24
Q

characteristics of polyps

A

nutrition
sessile

beth kr khatay hain yeh

25
Q

obelia has three types of zooids

A
26
Q

alternation of generation is present in

A

obelia

27
Q

examples

A

jelly fish( aurelia) , sea anemone( actinia), hydra, obelia, physalia, corals( madrepora), vellela

28
Q

aurelia

A

jelly fish
medusae are dominant and polyp are reduced

29
Q

actinia

A

sea anemone
sessile
only polyps
gastrovascular cavity divided into large partitions by septum called MESENTERIES

enteron - cavity

30
Q

madrepora

A

corals
exoskeleton CaCO3
form small coral islands and large coral reefs
rock gardens, aquaria, jewllery

31
Q

hydra reproduces asexualy through

A

budding

32
Q

repro of obelia

A

blastocyle(sessile)- asexual repro- medusae(motile)- sexual repro- gametes- join to form colonies

33
Q

zooids present in obelia

A

nutritive- gastrozoids
asexual repro- gonozoids and blastocyle
sexual- medusae

Animalia (8 decks)

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