Name: ______________
Block:_______________
Taxonomy WS #2
Dichotomous Keys
To discover what a particular species is, biologists use dichotomous keys to
help them identify things. Dichotomous keys are set up in paired statements
which are contradictory to each others. The organism either is one or the
other. Once you have picked one statement which applies to your organism,
you can move forward and try to narrow it down more.
Use this is an example of a dichotomous key for the insects
Daintrey’s Doings 
1
Name:________________
Block:____
Dichotomous Key
Use the dichotomous key on the following page to help you identify these
insects.
Daintrey’s Doings 
2
Daintrey’s Doings 
3