Q General Guidance: You should read through this week's assigned lab and/or Peerceptiv material before you make your post, so that your post will be informed, and you avoid posing a question that is answered in the course materials. General Format: You are required to make ONE post to each week’s lab discussion board. Your required post must contain 50 words at minimum and be written in your own words. Your grade will be determined by your demonstration of three areas of communication: application, critical thinking, and writing. Deadline: Your required post is due by 11:59PM, Wednesday. Late posts will be penalized 0.5 points (20%) per day late. NOTE: We recommend that you avoid using the smartphone/tablet Canvas app when submitting your discussion post, because the app frequently fails to associate posts with your corresponding discussion group. ________________________________________ This Week's Posting Prompt: Address at least ONE of the following prompts, pose a related question, or respond to a classmate's post. Now you should have your results, at least for the seed germination experiments. 1. What aspects of the experimental design of the seed germination experiments could be sources of error? How would you re-design the experiment to remove these sources of error? 2. What aspects of the experimental design of the gravitropism experiments could be sources of error? How would you re-design the experiment to remove these sources of error? 3. Look up the type of light from the visible spectrum that plants utilize for photosynthesis in “How Life Works” or elsewhere. Consider the following facts. Do any of these facts cause you to revise your initial hypothesis or explain any of the observations you have made during your experiments? Explain your answer. o Red light is of longer wavelength than blue and is much better at penetrating the soil o Blue light is able to penetrate snow cover, whereas red light is not o Germination does not require an external energy source, but normal growth after germination does depend on light for photosynthesis. 4. Were there any experimental results from either experiment that surprised you? How might an experimental plant biologist deal with surprising/unexpected results? 5. Can you think of a different experiment with lettuce seeds/seedlings that you could conduct with the materials in your lab kits? If so, what would your hypothesis and experimental predictions be?