Goldenrod+Gall+Lab+Outline

Goldenrod Galls created by Sara Kelzer 10-30-06 edited by ST

Materials: -Return prior assignments

1) Outline for the day 1. Objectives 2. Introduction 3. Data 4. Announcement

2) Goldenrod Galls -Objectives: Look at host/parasite interactions Apply the scientific method to evaluate interactions with gall phenotypes Descriptive statistics (part 1 of lab) Inferential statistics (part 2 of lab)

-INTRODUCTION: -Insect larvae can stimulate abnormal plant growth in goldenrod galls -Galls provide food, protection for larvae -Three types: 1) Round Galls 2) Elliptical Galls and 3) Rosette galls -Parasitoid: feeds progressively on larvae, and destroys the host, feeds only on a single parasite in their lifetime. -Parasite: larvae in the gall -Predator: beetle or bird

-METHODS: -Propose a question about round galls -State ONE hypothesis for your group -Describe each of your predictions for this hypothesis -Determine the variables you will need to know to answer this question -External and internal variables -As a class, we’ll collect data on all the variables (each group gets 6 galls) -Make sure students take all external measurements before opening the galls -Your group will analyze data, and present findings

-PRESENTATION: -Graphical predictions and description (mean, se, sd, etc) (lab 1) -Data analysis – and stats (t-test, correlation, chi-square) (lab 2)

3) Potential Announcements -Assignments due -Outside clothes needed -Location of lab