'Gonochorism' is a condition or a state of having just one of the two distinct sexes. Which of the following animals are gonochoristic or exhibit gonochorism?

Ascaris lumbricoides

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Planaria

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Fasciola

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Taenia solium

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Solution

The correct option is A Ascaris lumbricoides
Gonochorism is the biological phenomenon in which an animal is unisexual or shows only one sex of the two distinct sexes of an individual organism. Majority of the annelids show gonochorism or hermaphroditism and Ascaris Lumbricoides being an annelid shows the same phenomenon.
So, the correct answer is 'Ascaris lumbricoides'.

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