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Dichotomous Keys Biology 11 Ms. Lowrie

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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. - PowerPoint PPT Presentation

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Page 1: Dichotomous Keys

Dichotomous Keys

Biology 11Ms. Lowrie

Page 2: Dichotomous Keys

Dichotomous Keys Tool used to name or identify

unknown organisms “di” – two options

Page 3: Dichotomous Keys

How to Use One

1. Read both statements2. Select either (a) or (b)

Which describes the organism?3. Follow directions

Page 4: Dichotomous Keys

Do you know your plants?

Page 5: Dichotomous Keys

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

Page 6: Dichotomous Keys
Page 7: Dichotomous Keys

How’d you do?

A. Norno BeverlusB. Norno DallusC. Norno RajusD. Norno KentuckyusE. Norno CaliforniusF. Norno Wala WalaG. Norno DakotusH. Norno Yorkio

Page 8: Dichotomous Keys

Whale Key (pg 332)

Identify each whale

Page 9: Dichotomous Keys

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

Page 10: Dichotomous Keys

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.

Page 11: Dichotomous Keys

Difficult with Odd Numbers

Immediately pick something out that’s different

Let’s make one together! 3 hand sanitizers

Page 12: Dichotomous Keys

Questions???


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