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Classification-Dichotomous keys What is a dichotomous key?

Classification-Dichotomous keys What is a dichotomous key? A useful tool which uses a sequence of steps to classify and identify a living or non-living object Classifies objects according to whether a particular characteristic is present or absent

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Classification-Dichotomous keys What is a dichotomous key?

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  1. Classification-Dichotomous keys • What is a dichotomous key? • A useful tool which uses a sequence of steps to classify and identify a living or non-living object • Classifies objects according to whether a particular characteristic is present or absent • Can be represented in written or graphical form

  2. Written dichotomous key 1a. Object is living ………………………………. Go to 3 b. Object is non-living ………………………..….. Go to 2 2a. Object is a hard mineral …………………….. ROCK b. Object is made of tiny pieces of rock and organic matter ……………………………… SOIL 3a. Organism is a plant …………………………….. Go to 4 b. Organism is an animal …………………………. Go to 5 4a. Flowers of the plant have petals ………… DAISY b. Flowers of the plant have no petals ……. GRASS 5a. Animal has wings ………………………………… MAGPIE b. Animal has no wings ……………………………. SNAIL

  3. Graphical dichotomous key

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