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Bio: The Nerves system
Module 4: Unit 3, Animal Diversity
PYLUM:Cnidaria
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Botlhale Ditsoane
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Cards (15)
What is the alternative name for the phylum Cnidaria?
Coelenterata
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Which organisms are included in the phylum Cnidaria?
Jellyfish
,
blue bottles
, sea anemones, and corals
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Where are most Cnidarians found?
In
sea water
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What is a notable exception of Cnidarians that can be found in fresh water?
Hydra
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What type of body plan do Cnidarians have?
A
simple
body plan
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How is the body of Cnidarians structured in terms of symmetry?
Radially symmetrical
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What are the two layers of cells in the body wall of Cnidarians?
Ectoderm
and
endoderm
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What is the jelly-like layer found between the ectoderm and endoderm in Cnidarians?
Mesoglea
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What does it mean for Cnidarians to be diploblastic?
They have
two
layers of cells
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What is the central cavity in Cnidarians called?
Coelenteron
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How many openings does the coelenteron have?
One
opening, the
mouth
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Why are Cnidarians considered acoelomate animals?
They have no
coelom
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What role does the water in the coelenteron play?
It acts as a
hydrostatic
skeleton and aids in transport and
digestion
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What type of skeleton do corals have?
A
protein-like
or
calcareous
skeleton
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What are the two basic body forms of Cnidarians?
Polyp
Medusa
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