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# Classification

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### Classification

1. 1. Classification Create a Decision Tree and Dichotomous Key
2. 2. Classification <ul><li>  So far in class we have practiced classifying various things.  First we used a decision tree to separate things using their traits or characteristics. Then we used the decision tree, to create a dichotomous key. </li></ul>
3. 3. Your Task: Part 1 <ul><li>1. Study the pictures of the  </li></ul><ul><li>     macroinvertebrates on the following  </li></ul><ul><li>     slides. </li></ul><ul><li>2. Note characteristics like: number of legs, </li></ul><ul><li>     number of &quot;toes&quot;, gills, tails, &quot;eyes&quot;,  </li></ul><ul><li>     head, &quot;fan-like&quot; body parts. </li></ul><ul><li>3. Do not use characteristics like color or  </li></ul><ul><li>     size.  They're just not reliable. </li></ul>
4. 4. Your Task: Part 2 <ul><ul><li>﻿ Create a decision tree.  Be very specific </li></ul></ul><ul><li>     when labeling characteristics. </li></ul><ul><li>2.  Create a dichotomous key using your  </li></ul><ul><li>     decision tree. </li></ul>
5. 5. Stonefly Larva <ul><ul><li>number of legs? </li></ul></ul><ul><ul><li>number of &quot;toes&quot;? </li></ul></ul><ul><ul><li>number of tails? </li></ul></ul><ul><ul><li>gills? </li></ul></ul><ul><ul><li>well developed head? </li></ul></ul><ul><ul><li>&quot;fan-like&quot; body parts? </li></ul></ul><ul><li>  </li></ul>
6. 6. Alderfly Larva <ul><ul><li>number of legs? </li></ul></ul><ul><ul><li>number of &quot;toes&quot;? </li></ul></ul><ul><ul><li>number of tails? </li></ul></ul><ul><ul><li>gills? </li></ul></ul><ul><ul><li>well developed head? </li></ul></ul><ul><ul><li>&quot;fan-like&quot; body parts? </li></ul></ul><ul><li>  </li></ul>
7. 7. Caddisfly Larva (non-case builder) <ul><ul><li>number of legs? </li></ul></ul><ul><ul><li>number of &quot;toes&quot;? </li></ul></ul><ul><ul><li>number of tails? </li></ul></ul><ul><ul><li>gills? </li></ul></ul><ul><ul><li>well developed head? </li></ul></ul><ul><ul><li>&quot;fan-like&quot; body parts? </li></ul></ul><ul><li>  </li></ul>
8. 8. Dragonfly Larva <ul><ul><li>number of legs? </li></ul></ul><ul><ul><li>number of &quot;toes&quot;? </li></ul></ul><ul><ul><li>number of tails? </li></ul></ul><ul><ul><li>gills? </li></ul></ul><ul><ul><li>well developed head? </li></ul></ul><ul><ul><li>&quot;fan-like&quot; body parts? </li></ul></ul><ul><li>  </li></ul>
9. 9. Cranefly Larva <ul><ul><li>number of legs? </li></ul></ul><ul><ul><li>number of &quot;toes&quot;? </li></ul></ul><ul><ul><li>number of tails? </li></ul></ul><ul><ul><li>gills? </li></ul></ul><ul><ul><li>well developed head? </li></ul></ul><ul><li>  </li></ul>
10. 10. Blackfly Larva <ul><ul><li>number of legs? </li></ul></ul><ul><ul><li>number of &quot;toes&quot;? </li></ul></ul><ul><ul><li>number of tails? </li></ul></ul><ul><ul><li>gills? </li></ul></ul><ul><ul><li>well developed head? </li></ul></ul><ul><ul><li>&quot;fan-like&quot; body parts? </li></ul></ul><ul><li>  </li></ul>
11. 11. Mayfly Larva <ul><ul><li>number of legs? </li></ul></ul><ul><ul><li>number of &quot;toes&quot;? </li></ul></ul><ul><ul><li>number of tails? </li></ul></ul><ul><ul><li>gills? </li></ul></ul><ul><ul><li>well developed head? </li></ul></ul><ul><ul><li>&quot;fan-like&quot; body parts? </li></ul></ul><ul><li>  </li></ul>
12. 12. Caddisfly Larva (case builder) <ul><ul><li>number of legs? </li></ul></ul><ul><ul><li>number of &quot;toes&quot;? </li></ul></ul><ul><ul><li>number of tails? </li></ul></ul><ul><ul><li>gills? </li></ul></ul><ul><ul><li>well developed head? </li></ul></ul><ul><ul><li>&quot;fan-like&quot; body parts? </li></ul></ul><ul><li>  </li></ul>
13. 13. Riffle Beetle Adult <ul><ul><li>number of legs? </li></ul></ul><ul><ul><li>number of &quot;toes&quot;? </li></ul></ul><ul><ul><li>number of tails? </li></ul></ul><ul><ul><li>gills? </li></ul></ul><ul><ul><li>well developed head? </li></ul></ul><ul><ul><li>&quot;fan-like&quot; body parts? </li></ul></ul><ul><li>  </li></ul>
14. 14.   <ul><ul><li>number of legs? </li></ul></ul><ul><ul><li>number of &quot;toes&quot;? </li></ul></ul><ul><ul><li>number of tails? </li></ul></ul><ul><ul><li>gills? </li></ul></ul><ul><ul><li>well developed head? </li></ul></ul><ul><ul><li>&quot;fan-like&quot; body parts? </li></ul></ul><ul><li>  </li></ul>