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Question

Identify (1), (2) and (3) from the given table.

PhylumGerm layerBody cavity(1) __________TriploblasticNo coelomNematodaTriploblastic(2) __________Annelida(3) ________True coelom


A
(1) Porifera, (2) No coelom, (3) Diploblastic
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B
(1) Platyhelminthes, (2) True coelom, (3) Triploblastic
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C
(1) Platyhelminthes, (2) False coelom, (3) Triploblastic
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D
(1) Porifera, (2) False coelom, (3) Triploblastic
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Solution

The correct option is C (1) Platyhelminthes, (2) False coelom, (3) Triploblastic
In the animal kingdom, different Phylums have different characteristics. For example,
Phylum Platyhelminthes - The animals belonging to this phylum are triploblastic. They lack body cavity and hence are called acoelomates.
Phylum Nematoda - The animals belonging to this phylum are triploblastic but they have a body cavity lined by patches of mesoderm. Thus they are considered as psuedocoelomates.
Phylum Annelida - The animals belonging to this phylum are triploblastic with true body cavity (eucoelomates).

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