Dichotomous Keys Biology 11 Ms. Lowrie.

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1 Dichotomous Keys Biology 11 Ms. Lowrie

2 Dichotomous Keys Tool used to name or identify unknown organisms
“di” – two options

3 How to Use One Read both statements Select either (a) or (b)
Which describes the organism? Follow directions

4 Do you know your plants?

5 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

6

7 How’d you do? Norno Beverlus Norno Dallus Norno Rajus Norno Kentuckyus
Norno Californius Norno Wala Wala Norno Dakotus Norno Yorkio

8 Whale Key (pg 332) Identify each whale

9 Answers killer whale - Orcinus orca
humpback whale - Megaptera novaeangliae Beluga - Delphinapterus leucas narwhal - Mmnodon monoceros sperm whale- Physeter macrocephalus blue whale - Balaenoptera musculus bowhead whale - Balaena mysticetus

10 Analysis Questions What are four characteristics used to classify whales? Why might biologist use a key? (in general) Provide an example of when a biologist might use a key to classify a whale? Make a list of other characteristics that could be used to classify whales.

11 Difficult with Odd Numbers
Immediately pick something out that’s different Let’s make one together! 3 hand sanitizers

12 Questions???