Single Choice

Which of the following statements is not correct regarding sexuality in organisms?

AWhen both male and female flowers are present on the same plant, the condition is said to be monoecious and is present in cucurbits and coconuts
BWhen both male and female flowers are present on the separate plants, the condition is said to be dioecious and is present in papaya and date palms
CIn earthworm, both male and female sex organs are present in the same individual and therefore, self-fertilisation occurs in them
Correct Answer
DCockroach is an unisexual animal and exhibit sexual dimorphism

Solution

Cross-fertilization occurs in many hermaphrodite animals as in earthworm. It is due to the fact that their male and female reproductive organs mature at different times.
Thus, the correct answer is 'In earthworm, both male and female sex organs are present in the same individual and therefore, self-fertilization occurs in them.'

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