The female roundworm (Ascaris) is differentiated from the male roundworm by which of the following characteristics?

Having a coiled posterior end

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Having a segmented body

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Being smaller in size

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Having a straight posterior end

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Solution

The correct option is D Having a straight posterior end
In Ascaris, male and female worms can be differentiated on the basis of morphology. The female is larger in size and has a straight tail (posterior end) while males are smaller and have a curved/coiled tail.
Thus, the correct answer is option D.

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