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Question

Metamerism is the characteristic of

A
Ascaris
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B
Pheretima
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C
Periplaneta
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D
Hydra
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Solution

The correct option is B Pheretima
Metamerism is the phenomena where the animal has internal as well as external segmentation. In true metamerism, the homologous organs, like nephridia, nerves, muscles, reproductive organs, appendages etc. are present in each segment but these organs function in coordination with the others. It is shown by Pheretima. So, the correct answer is option B.

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