Dichotomous keys
A dichotomous key names a living thing by asking a chain of questions, each with exactly two answers: does it have wings or not? Six legs or eight? Each answer sends you on to the next pair of choices, until only one name is left. Biologists use keys to identify a living thing they have never seen before, and building one trains you to look for the traits that really set groups apart.
Depth 1 · Foundation
You can follow a dichotomous key step by step to name a living thing, and build a simple key for a few living things from traits anyone can see.
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Foundation
You can follow a dichotomous key step by step to name a living thing, and build a simple key for a few living things from traits anyone can see.
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