Biology Lab

Lab 3 Ecology of Organisms BIO101L

Student Name: Click here to enter text.

Access Code (located on the lid of your lab kit):

Pre-Lab Questions

1. Would you expect endangered species to be more frequently generalists or specialists? Explain your answer.

Click here to enter text.

2. How does temperature affect water availability in an ecosystem?

Experiment 1: Effects of pH on Radish Seed Germination

Table 1
WaterVinegarBaking Soda
pHClick here to enter text.Click here to enter text.Click here to enter text.
DaySeeds GerminatedObservationsSeeds GerminatedObservationsSeeds GerminatedObservations
1Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.
2Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.
3Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.
4Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.
5Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.
6Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.
7Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.Click here to enter text.

Post-Lab Questions

1. Record your hypothesis from Step 6 here:

2. 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…).

3. 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.

4. 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.

5. 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? Is acid rain a problem for plant species and crops?

6. Insert photo of your seeds on the 7th day with your name and access code handwritten in the background.

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