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Question

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

PhylumGerm layerBody cavity(1) __________TriploblasticAcoelomatesAschelminthesTriploblastic(2) __________Annelida(3) ________Eucoelomates


A
(1) Porifera, (2) Acoelomates, (3) Diploblastic
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B
(1) Platyhelminthes, (2) Eucoelomates, (3) Triploblastic
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C
(1) Platyhelminthes, (2) Pseudocoelomates, (3) Triploblastic
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D
(1) Porifera, (2) Pseudocoelomates, (3) Triploblastic
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Solution

The correct option is C (1) Platyhelminthes, (2) Pseudocoelomates, (3) Triploblastic
In the animal kingdom, different phylum have different body characteristics. For example,
  • Phylum Platyhelminthes - The animals belonging to this phylum are triploblastic i.e., they have 3 germ layers - Ectoderm, endoderm and mesoderm and they lack body cavity hence are called acoelomates.
  • Phylum Aschelminthes - 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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