Making A Dichotomous Key
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Biology II --- January 2012
Making a Dichotomous Key --- Bacteria
Now that you’ve learned about some of the main characteristics of bacterial classification, you will
need to apply what you know. Your job is to make a dichotomous key to identify the 12 illustrated
bacteria on the last page.
Directions
1. Your first job is to outline the terms used to classify bacteria so you can use them in your
dichotomous key. The terms you will need to use fall in three categories: bacteria shape,
group arrangement, and flagella arrangement. Fill out the table below so you can use these
terms.
Shape
Description/illustration
1.
2.
3.
4.
Group Arrangement
Description/illustration
1.
2.
3.
Flagella Arrangement
Description/illustration
1.
2.
3.
4.
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