1. Unit Two, Day 9
Plants

2. Opener 15 minutes In groups at your table-
Discuss the cladogram of the divergence of lice that you made or the information that you read about
Information that describes the speciation of lice
What do we know?
When did chimps, gorillas and humans diverge?
How many different types of louse are there for each of the primates above?
What other dates are important?

3. Agenda
Divergence of Lice
Plants

4. New Learning Targets
I can analyze the data provided by a phylogenetic tree or cladogram to determine the evolutionary history of the organisms described in the diagram
In short: I can read cladograms
I can use a data set to create a cladogram that represents a reasonable hypothesis about the evolutionary history of a group of related organisms
In short: I can make a cladogram

5. So what happened to the louse?
Groups Isolated within Species
(sympatric or allopatric)
Evolution
So what happened to the louse?
Species A
Species B
Reproductive barrier

7. Primate speciation occurs, this means habitat isolation for the lice
Body Lice
Head Lice
170,000 YA clothing
Loss of Hair
Pubic Lice
3.3 MYA
Colonization of Gorilla Lice
Chimp Lice
Human Lice
Gorilla Lice
6 MYA
Primate speciation occurs, this means habitat isolation for the lice
Human Lice
Chimp Lice
12 MYA

8. Old Learning Targets
I can explain how artificial selection works as a mechanism for evolution
I can determine if a set of data shows statistically significant variation using a Chi-Squared analysis

9. Plants

10. Plant Hairs
You need to now count the number of trichomes on each plant and record down the number
Keep careful record of what plant has what “hairyness”

11. Share out!

12. Histogram in your packet and notebook
Set up axes:
X-ranges from data table
Y-number of plants in range
Create a histogram—one bar for each range
Helps predict how things will shift in a population: this is evolution!

13. Culling What was our cut off last time?
We need to “weed” out the plants that don’t fit in the spectrum
Cut at the base carefully

14. Lab Report
To determine if evolution has occurred!