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What type of fertilization is exhibited by an earthworm?

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in Biology – Class 11 by (272k points)
What type of fertilization is exhibited by an earthworm?

(a) Internal and cross-fertilization

(b) External and cross-fertilization

(c) Internal and self-fertilization

(d) External and self-fertilization

I have been asked this question in an interview.

My doubt is from Animals topic in section Structural Organisations in Animals of Biology – Class 11

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Correct option is (b) External and cross-fertilization

The explanation is: The type of fertilization exhibited by earthworm is External and cross-fertilization. Fertilisation and development occur within the cocoons which are deposited in the soil. Development of earthworms is direct, i.e., there is no larva formation.

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