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Question

Coelom of animals commonly known as tooth shells originates from

A
By enterocoelic method
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B
By schizocoelic method and filled with coelomic fluid
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C
By splitting of embryonic mesoderm and filled with blood
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D
From blastocoel
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Solution

The correct option is C By splitting of embryonic mesoderm and filled with blood
The true coelom is a body cavity which arises in embryonic mesoderm. In arthropods, annelids and Mollusca, it originates by splitting of embryonic mesoderm. It is called schizocoelom. The cavity is filled with a colourless blood called as haemocoel.
Thus, the correct answer is option C.

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