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You are watching: Does cutting a worm in half make two

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CategoriesNooks and also cranniesYesteryearSemantic enigmasThe body beautifulRed tape, white liesSpeculative scienceThis sceptred isleRoot of all evilEthical conundrumsThis sporting lifeStage and screenBirds and also the bees BIRDS and also THE BEESIf you cut a worm in two does it end up being two worms? NO, the two halves differ. The full-grown garden worm, Lumbricus terrestris, has a body comprised of about 150 small rings, each with hair-like, rearward barbs the make it hard to pull the worm native its hole, or to swallow in reverse. The mouth and first 31 rings kind the pointed front. Then comes a thickened region, ring 32 come 37, the clitellum, supplied in sex: worms might be hermaphrodite, yet pairs join in shared "69s" on damp nights. The remainder of the body is uniform till it flattens out at the anus. Cut a worm in half (please don"t), and the front normally grows a new, if shorter, tail end. Because that the old tail, shorn of an essential organs, it"s the end; however that"s not the finish of the tale. Lumbricus and also the various other two dozen varieties of brother earthworms (1,500 worldwide) are innovative tillers the the soil. However, in pond and stream over there swims a an ext primitive worm, black and half an inch long: the flatworm (planaria). Cut one in two: the head grow a tail, the tail a head. Reduced one in three: even the center grows both new head and also tail. Each part become whole is assumed to lug the storage of its previously entity; therefore beware, if you open this can of worms they might seek revenge. And they"re carnivorous. Invoice Allen, Oxshott, Surrey. I"d choose to know more about those carnivorous flatworms please. Invoice Allen indigenous Oxshott, Surrey - could you elaborate? Gill Holmes, Twickenham, UK include your answer


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