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XSIQ
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Biology - Choosing characteristics for dichotomous keys
Choosing characteristics for dichotomous keys
Dragon fly
Dichotomous keys group similar organisms [1] together.
When designing keys of organisms, biologists try to select characteristics
[2] that group the organisms in a way that reflects their overall
similarity.
Bat
For example, if you were classifying animals it might be tempting to
divide them into two groups using their ability to fly or not. Within the
flying group you would have insects and bats.
However, when you consider all their characteristics, bats have far less
in common with insects than they do with many non-flying animals such as
humans. Therefore, bats would be better placed in the same group as humans
than with insects.
Links:
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[1] http://alison.com/#
[2] http://alison.com/#
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