1. Have your Homework out and ready.
WELCOME, BIO-NINJAS
Today you will need: Writing Utensil, Bellwork Sheet, Journal.
Have your Homework out and ready.
Bellwork: Copy the question AND write your entire answer choice.
Which of the following organisms are most closely related?
A. Asterias rubens and Asterias forbesi
B. Bubulcus ibis and Xenicibis xympithecus
C. Ophiderma salamandra and Salamandra algira
D. Ceanothus americanus and Lethocerus americanus

2. Standard B8.B
Categorize organisms using a hierarchical classification system based on similarities and differences shared among groups
Essential Question: What makes a dichotomous key a useful tool for biologists?

3. Homework last night… Dichotomous Key by Mark Drollinger
Due tomorrow at the beginning of class.
Yes, there will be a quiz.
Time on the video is only 2:39. 

4. Quiz Time Quiz tomorrow: know these terms
You will have 7 minutes to complete the quiz
Open your journals when you return to your seats
Quiz tomorrow: know these terms
Kingdom
Taxonomy
Family
Genus
Scientific name
Class
Taxon
Phylum
Dichotomous Key
Species
Domain
Binomial Nomenclature
Linneaus
Order
Cladogram

5. Taxonomy Recap… MORE EXCLUSIVE (INCLUDES LESS)
MORE INCLUSIVE (INCLUDES MORE STUFF)
MORE EXCLUSIVE (INCLUDES LESS)

6. Taxonomy Recap… ORAGNISMS MORE CLOSELY RELATED
ORGANISMS BECOME LESS RELATED
ORAGNISMS MORE CLOSELY RELATED

7. Taxonomy Recap…
If an organism is in one Taxon, then it is automatically included in any taxa above it!
But not necessarily included in the taxa below it

8. Dichotomous = divided or dividing into two parts
Scientists use dichotomous keys and field guides to help people identify organisms
Dichotomous key – tool that asks a series of questions that can be answered in only two ways
Each answer leads to another question which will eventually leading to the item’s identification
Sometimes represented as a flow chart

9. Dichotomous key Example 1:
EXPLORE: Introduce your students to the dichotomous key. Together, use the key to identify the group to which each organism belongs.
Assign the student reading. You may also wish to direct your students’ attention to the “Kingdoms” animation which is accessible from the multimedia lesson home page.

10. 1a Candy is not hard ……………………………………………
1a Candy is not hard …………………………………………….2 1b Candy is hard ……………………………………………………..7 2a Candy is wrapped ……………………………………………….3 2b Candy is not wrapped ………………………………………..Ursa gummus 3a Candy is rounded …………………………………………………..4 3b Candy is not rounded ……………………………………………5 4a Wrapper is all white and semi-transparent…………………………Saltus taffina 4b Wrapper is not all white …………………………………………….5 5a Wrapper is mostly brown and white …………………………………..Tutus rollus 5b Wrapper is not brown and white ………………………………………6 6a Wrapper is silver ………………………………………………………Chocolatus cyssan 6b Wrapper varies in color ……………………………………………Steorra explodus 7a Candy is spherical (ball-shaped) …………………………………………….8 7b Candy is not spherical ……………………………………………………….9 8a Candy is wrapped ……………………………………………………………11 8b Candy is not wrapped ……………………………………………….Mandibulus crackus 9a Wrapper is transparent (see-through) with no writing …………………….10 9b Wrapper is transparent and tells flavor ………………………….Joyous rancheria 10a Wrapper is clear ……………………………………………………..Mintus stripus 10b Wrapper is yellow ………………………………………………Rannunculus schotchus 11a Candy is on a stick ………………………………………………………..Moronus moronus 11b Candy is not on a stick ……………………………………………………Spherus combustus

11. Practice!

12. Dichotomous Key for conifers

13. Whose shoes? A class dichotomous key
ELABORATE: This fun class activity requires very little set up and provides additional practice in writing and using dichotomous keys.