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Question
Self-fertilization occurs in bisexual animals except
Self-fertilization occurs in bisexual animals except
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Solution
The correct option is D Both A and B
Self-fertilisation is the fertilisation of plants and some invertebrate animals by their own sperm rather than that of another individual. It occurs in bisexual animals as in flatworms and molluscs but though earthworm has both male and female sex organs, they cannot self-fertilize because sperms and ova mature at the different time. Thus, the correct answer is option D.
Self-fertilisation is the fertilisation of plants and some invertebrate animals by their own sperm rather than that of another individual. It occurs in bisexual animals as in flatworms and molluscs but though earthworm has both male and female sex organs, they cannot self-fertilize because sperms and ova mature at the different time. Thus, the correct answer is option D.
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