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  • Asexual, like an earthworm? Capable of reproducing without a partner?

    Off the top of my head:Earthworms are hermaphrodites, with male and female organs within the same individual.

    Copulation and reproduction are separate processes in earthworms. The mating pair overlap front ends ventrall and each exchanges sperm with the other. The egg case, or cocoon, is secreted by the clitellum (no sniggering at the back) the external glandular band which is near the front of the worm, but behind the spermathecae.

    Some time after copulation, long after the worms have separated, the clitellum secretes the cocoon which forms a ring around the worm. It then backs out of the ring, and as it does so, injects its own eggs and the other worms sperm into it.

    As the worm slips out, the ends of the cocoon seal to form a vaguely lemon-shaped incubator in which the embryonic worms develop. They emerge as small, but fully-formed earthworms – except for a lack of sexual structures – which develop about 60-90 days later. They are fully grown in one year.

    Some common earthworm species are mostly parthonegenic, that is, with asexual reproduction resulting in clones.

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