AP DAY

Opener  Take out or check out an Internet enabled device  Check your AP Bio . You should have FOUR s from Ziady sharing the following with you:  A test document  AP HW #2  AP HW #3  Summary Write: Natural Selection  Task: Make sure you can OPEN and EDIT these documents 7-10 MINUTES Want to work on your phone? Download GOOGLE DRIVE

Agenda  Natural Selection Summary Write  Discuss HW #3  Lab One: M&M Color Chi Squared Analysis  HW #1 Returned  Textbooks

Learning Targets  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

Writing  Check your gmail; find the gmail where I shared the “Summary Write” doc with you.  Respond to prompt IN THAT DOC!  You can use your notes, BUT try to keep track (in your brain) of how much you used them  DO YOUR BEST: this piece of writing will help me determine what you understand  You have 25 minutes  If you finish early: re-read, edit, underline key terms, add images to support your answer

Prompt  Explain how natural selection results in the evolution of populations over time.  Include at least one example to illustrate your point  Use the correct scientific vocabulary: species, population, variation, trait, heritable, environment, fitness, adaptation/adapt, reproduction, offspring  Make sure your explanation includes a description of both the short term AND long term impacts of natural selection on a population

AP Bio Website

Question # 1 1. What is the Chi-Square test for?

Question #2  What do the different terms in the equation ( χ 2, Σ, O i, E i ) stand for?

Question #3  What is the null hypothesis?

Question #7 Basic idea: given the choice to move to a wet or dry environment, where will the pill bugs go? CALCULATE THE CHI-SQUARED VALUE AND EVALUATE THE NULL HYPOTHESIS. Show answer on white board

Chi Squared Table

M&M Lab  Read the Introduction to the Lab, and the procedure  Separate your M&Ms by color, and count the number of each type  Determine the expected value for each color (percentage x total)  Complete data table and calculate Chi-Squared value  Determine degrees of freedom, use chart to evaluate null hypothesis  Share data with class! Rinse and repeat with class data, then answer questions.

M&M class data  Each table group needs to:  Share number observed for each color of M&M  THEN, this data will be used to complete the SECOND data table/Chi-Squared analysis  If we have time, you can finish this in class later. If not, it is homework.  DUE Monday, if not finished in class. You must complete:  Data tables/calculations  Analysis Questions

AP Bio Website