26 Jun electronically and submit it via the Assignments Folder
Question
On your own and without assistance, complete this Lab 7 Answer Sheet
electronically and submit it via the Assignments Folder by the date listed in the Course
Schedule (under Syllabus).
To conduct your laboratory exercises, use the Laboratory Manual located under
Course Content. Read the introduction and the directions for each exercise/experiment
carefully before completing the exercises/experiments and answering the questions.
Save your Lab 7 Answer Sheet in the following format: LastName_Lab7 (e.g.,
Smith_Lab7).
You should submit your document as a Word (.doc or .docx) or Rich Text Format
(.rtf) file for best compatibility.
© eScience Labs, LLC 2014
Pre-Lab Questions
1. Would you expect endangered species to be more frequently generalists or specialists?
Explain your answer.
2. How does temperature affect water availability in an ecosystem?
3. Choose a species and describe some adaptations that species developed that allow them to
survive in their native habitat.
© eScience Labs, LLC 2014
Experiment 1: Effects of pH on Radish Seed Germination
Data Tables and Post-Lab Assessment
Table 1: pH and % Radish Seed Germination
Stage/Day
Observations
Acetic Acid
Sodium Bicarbonate
Water
Initial pH
Day 1
Day 2
Day 3
Day 4
Day 5
Day 6
Day 7
Post-Lab Questions
1. Compare and construct a line graph based on the data from Table 1 in the space below.
Place the day on the x axis, and the number of seeds germinated on the y axis. Be sure to
include a title, label the x and y axes, and provide a legend describing which line
corresponds to each plate (e.g., blue = acetic acid, green = sodium bicarbonate, etc).
© eScience Labs, LLC 2014
© eScience Labs, LLC 2014
© eScience Labs, LLC 2014
2. Was there any noticeable effect on the germination rate of the radish seeds as a result of
the pH? Compare and contrast the growth rate for the control with the alkaline and acidic
solutions.
3. According to your results would you say that the radish has a broad pH tolerance? Why or
why not? Use your data to support your answer.
4. Knowing that acid rain has a pH of 2 – 3 would you conclude that crop species with a narrow
soil pH range are in trouble? Explain why, or why not, using scientific reasoning. Is acid rain
a problem for plant species and crops?
© eScience Labs, LLC 2014
5. Research and briefly describe a real world example about how acid rain affect plants. Be
sure to demonstrate how pH contributes to the outcome, and proposed solutions (if any).
Descriptions should be approximately 2 – 3 paragraphs. Include at least three citations (use
APA formatting).
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