Dichotomous Keys
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Transcript of Dichotomous Keys
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Dichotomous Keys
Biology 11Ms. Lowrie
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Dichotomous Keys Tool used to name or identify
unknown organisms “di” – two options
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How to Use One
1. Read both statements2. Select either (a) or (b)
Which describes the organism?3. Follow directions
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Do you know your plants?
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Norn Classification
Belong to genus Norno
Divided into eight species Located in specific regions
Task: Use dichotomous key to identify
Write their scientific name (genus + species) on the blank
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How’d you do?
A. Norno BeverlusB. Norno DallusC. Norno RajusD. Norno KentuckyusE. Norno CaliforniusF. Norno Wala WalaG. Norno DakotusH. Norno Yorkio
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Whale Key (pg 332)
Identify each whale
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Answers
7) killer whale - Orcinus orca8) humpback whale - Megaptera
novaeangliae9) Beluga - Delphinapterus leucas10) narwhal - Mmnodon monoceros11) sperm whale- Physeter macrocephalus12) blue whale - Balaenoptera musculus13) bowhead whale - Balaena mysticetus
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Analysis Questions
a) What are four characteristics used to classify whales?
b) Why might biologist use a key? (in general)
c) Provide an example of when a biologist might use a key to classify a whale?
d) Make a list of other characteristics that could be used to classify whales.
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Difficult with Odd Numbers
Immediately pick something out that’s different
Let’s make one together! 3 hand sanitizers
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Questions???