Annelids are similar to Nematodes. They are bilaterally symmetrical, cylindrical in shape and triploblastic. Still, they are placed in a separate category. Why?

Due to different type of coelom

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Due to presence of body segmentation

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Due to organ differentiation

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Due to the mode of living

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Solution

The correct option is C Due to organ differentiation
The difference in the type of coelom categorises Annelids and Nematodes. Annelids are the first organisms to show a true body cavity, whereas Nematodes have false coelom (pseudocoelom). Annelids are different from nematodes. They possess segmented body with extensive organ differentiation. Thus, annelids are little more complex in the organisation than the nematodes.

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