Dichotomous Keys Biology 11 Ms. Lowrie
Dichotomous Keys Tool used to name or identify unknown organisms “di” – two options
How to Use One Read both statements Select either (a) or (b) Which describes the organism? 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? Norno Beverlus Norno Dallus Norno Rajus Norno Kentuckyus Norno Californius Norno Wala Wala Norno Dakotus Norno Yorkio
Whale Key (pg 332) Identify each whale
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
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.
Difficult with Odd Numbers Immediately pick something out that’s different Let’s make one together! 3 hand sanitizers
Questions???