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Dichotomous Keys Tool used to name or identify unknown organisms “di” – two options
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Dichotomous Keys
Biology 11Ms. Lowrie
Dichotomous Keys Tool used to name or identify
unknown organisms “di” – two options
How to Use One
1. Read both statements2. Select either (a) or (b)
Which describes the organism?3. Follow directions
Do you know your plants?
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
How’d you do?
A. Norno BeverlusB. Norno DallusC. Norno RajusD. Norno KentuckyusE. Norno CaliforniusF. Norno Wala WalaG. Norno DakotusH. Norno Yorkio
Whale Key (pg 332)
Identify each whale
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
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.
Difficult with Odd Numbers
Immediately pick something out that’s different
Let’s make one together! 3 hand sanitizers
Questions???
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