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Question

The words diploblastic and triploblastic refer to _____ and _____ germinal layers respectively.


A

1 & 2

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B

2 & 3

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C

3 & 2

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D

2 & 1

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Solution

The correct option is B

2 & 3


The number of layers organised during the embryonic stage is an important criterion for the classification of animals. If the embryonic stage of a particular animal has two germinal layers (ectoderm and endoderm), it is said to be diploblastic, and if the embryo has three germinal layers (ectoderm, mesoderm and endoderm), it is said to be triploblastic.


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