410 Germination Group Paper

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American River College *

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Course

410

Subject

Biology

Date

Jan 9, 2024

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docx

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3

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Germination Group Lab Paper 1-2 pages Worth: 25 points Due: Sunday, October 1, 11:59 p.m. Group Assignments—IMPORTANT! You will have several group assignments this semester. The benefit of group assignments is NOT to divide the work, thereby reducing the time and energy required to complete an assignment. A major benefit of group assignments is practicing your science collaboration skills! To achieve this benefit, each person must contribute, each question must be discussed by the entire group, and each person must proofread all answers before an assignment is submitted. This process should help each of you improve your learning by better increasing your understanding of course concepts. Turn in: One lab paper per group; Your group’s answers to the questions on the following pages. Don’t copy any information without proper citation (use APA) and use of quote marks, if appropriate. The majority of your group’s paper must be in your own voice—not quotes or paraphrased materials. Your group’s paper must be submitted electronically . Please submit the file as a PDF. Immediately after submitting a file to Canvas, each person in a group should: * Verify that the file was successfully uploaded; * Verify that it is the correct and complete file for grading; Once the folder closes, the last file submitted will be the file graded. (continued) Your lab paper should answer the following questions. This document is available on Canvas as a Google Doc so that you make a copy and easily provide your answers after each question. 1. What are the names of your group members (four maximum unless you have a group with five) who participated in the experiment and helped to prepare this lab paper? 1 BIOL 410
Explain each group member’s contribution to the experiment. If all group members participated equally, state that they did. This question must be answered to receive any points. 2. Background info: Describe the natural processes that can overcome seed dormancy. Consider both endogenous (in seed) and exogenous (environment) factors. You may need to do some research to answer this. 3. Analyze the class data by using Z-test analyses and complete the following tables. Carefully read “Statistical Tests for BIOL 410” at the end of the Lab Manual . Indicate which Z-values are significant in each table by appropriately using “***”. . Table A Z-test analyses of the effects of two growth regulators, each at two different concentrations, on seed germination of two species after two days using the class data. Name of Plant Seed Control (DI water) 10 -4 molar ABA 10 -6 molar ABA 10 -4 molar GA 10 -6 molar GA Proportion* of carrot seeds to germinate Z-value** Z-value probability Proportion* of radish seeds to germinate Z-value** Z-value probability * Express proportion as a fraction and decimal, for example 24/50=0.48 ** Z-values calculated by using the appropriate control data (carrot or radish) and one of the experimental groups. *** Statistically different from appropriate control (P< 0.05). (continued) 2 BIOL 410
3. (continued) Table B Z-test analyses of the effects of two growth regulators, each at two different concentrations, on seed germination of two species after seven days using the class data. Name of Plant Seed Control (DI water) 10 -4 molar ABA 10 -6 molar ABA 10 -4 molar GA 10 -6 molar GA Proportion* of carrot seeds to germinate Z-value** Z-value probability (p- value) Proportion* of radish seeds to germinate Z-value** Z-value probability (p- value) * Express proportion as a fraction and decimal, for example 24/50=0.48 ** Z-values calculated by using the appropriate control data (carrot or radish) and one of the experimental groups. *** Statistically different from appropriate control (P< 0.05). 4. Summarize the statistically significant effects of ABA on seed germination at Days 2 and 7. Explain how the statistically significant effects of ABA are or are not as expected. Include how ABA and concentration are expected to affect seed germination. 5. Summarize the statistically insignificant effects of ABA on seed germination. Explain how the statistically insignificant effects of ABA are or are not as expected. 6. Summarize the statistically significant effects of GA on seed germination at Days 2 and 7. Explain how the statistically significant effects of GA are or are not as expected. Include how GA and concentration are expected to affect seed germination. 7. Summarize the statistically insignificant effects of GA on seed germination. Explain how the statistically insignificant effects of GA are or are not as expected. 8. Summarize any major differences in how each species of plant (seeds) responded to ABA and GA. Focus on the trends in the data for this question. NOTE : You cannot use Z-tests to answer this question. 3 BIOL 410
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