1. AP Bio Day 5

2. Warm Up
Make your plant observations
Make sure to water them
Day ____

3. Agenda Modeling Natural Selection: Wooly Worms Work: Homework
More Chi-Squared practice! Another opportunity to nail down your understanding of Natural Selection!
Work:
Turn in your M & M Lab
Turn in your Chi squared practice if you haven’t
Homework
Study Guide
Assessment Thursday

4. Unit One Learning Target #1
I can explain how natural selection works as a “major mechanism” for evolution
I can determine if a set of data shows statistically significant variation using a Chi-Squared analysis

5. Wooly Worm Lab Read the Wooly Worm handout (first page only)
As a table group, come up with the null hypothesis
Question 1 in analysis
You have 10 minutes. Be ready to explain what we are doing in this activity.

6. Wooly Worms The environment: the front area
The trait: color (10 different colors=variation)
Dark Brown = Black
The question: do different colors of worms have different levels of fitness?
You: predatory birds
Your tasks: find and “eat” up to FIVE worms in a one minute period

7. Wooly Worms Null Hypothesis
N=nothing
Accept- no significant difference of what you observed or expected (nothing acting on the system)
Reject- something is acting on the system but you might not know the reasoning behind it.
Analysis: if differences are seen, are they statistically significant (i.e.: do they have a CAUSE?)?