classification
DESCRIPTION
TRANSCRIPT
![Page 1: Classification](https://reader035.vdocuments.us/reader035/viewer/2022062613/5452d28daf7959ed5f8b7d51/html5/thumbnails/1.jpg)
ClassificationCreate a Decision Tree and
Dichotomous Key
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Classification
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.
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Your Task: Part 1
1. Study the pictures of the macroinvertebrates on the following slides.2. Note characteristics like: number of legs, number of "toes", gills, tails, "eyes", head, "fan-like" body parts.3. Do not use characteristics like color or size. They're just not reliable.
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Your Task: Part 2
1.Create a decision tree. Be very specific
when labeling characteristics.2. Create a dichotomous key using your decision tree.
![Page 5: Classification](https://reader035.vdocuments.us/reader035/viewer/2022062613/5452d28daf7959ed5f8b7d51/html5/thumbnails/5.jpg)
Stonefly Larva
•number of legs?•number of
"toes"?•number of tails?•gills?•well developed
head?•"fan-like" body
parts?
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Alderfly Larva
•number of legs?•number of
"toes"?•number of tails?•gills?•well developed
head?•"fan-like" body
parts?
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Caddisfly Larva (non-case builder)
•number of legs?•number of
"toes"?•number of tails?•gills?•well developed
head?•"fan-like" body
parts?
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Dragonfly Larva
•number of legs?•number of
"toes"?•number of tails?•gills?•well developed
head?•"fan-like" body
parts?
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Cranefly Larva
•number of legs?•number of
"toes"?•number of tails?•gills?•well developed
head?
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Blackfly Larva
•number of legs?•number of
"toes"?•number of tails?•gills?•well developed
head?•"fan-like" body
parts?
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Mayfly Larva
•number of legs?•number of
"toes"?•number of tails?•gills?•well developed
head?•"fan-like" body
parts?
![Page 12: Classification](https://reader035.vdocuments.us/reader035/viewer/2022062613/5452d28daf7959ed5f8b7d51/html5/thumbnails/12.jpg)
Caddisfly Larva (case builder)
•number of legs?•number of
"toes"?•number of tails?•gills?•well developed
head?•"fan-like" body
parts?
![Page 13: Classification](https://reader035.vdocuments.us/reader035/viewer/2022062613/5452d28daf7959ed5f8b7d51/html5/thumbnails/13.jpg)
Riffle Beetle Adult
•number of legs?•number of
"toes"?•number of tails?•gills?•well developed
head?•"fan-like" body
parts?
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•number of legs?•number of
"toes"?•number of tails?•gills?•well developed
head?•"fan-like" body
parts?