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

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???