Virtual Lab: Population Biology



Paramecium Lab(Virtual Lab: Population Biology) Background: A paramecium is a single celled organism that you can see with a microscope.Purpose: You will grow two species of the protozoan Paramecium, alone and together. You will then compare growth curves of the populations of each species.Question: How will the growth of the two populations of Paramecium change if they are grown together?Hypothesis: (answer the question above) _____________________________________ ______________________________________________________________________IV: ____________________________________________________________________DV: ___________________________________________________________________Procedure: This lab has instructions on the left hand. You do not need to click on the Journal button since you will be entering data in your data table below. Briefly explain the procedures (how did you test your hypothesis) __________________________________ ______________________________________________________________________________________________________________________________________________Data Table?P. aurelia grown alone, cells/mLP. caudatum grown alone, cells/mLP. aurelia grown in mixed culture, cells/ mLP. caudatum grown in mixed culture, cells/mLDay O???Day 2???Day 4???Day 6???Day 8???Day 10???Day 12???Day 14???Day 16???Data Analysis: Create a graph to show how the populations of paramecium changed over 16 days, each grown alone and then together. You will need to include: a title, labels for the x axis and y axis, 4 lines (each a different color), a key, and correct units. __________________________________Key:P. aurelia grown alone= P. caudatum grown alone= P. aurelia grown together= P. caudatum grown together= Conclusion Questions:On what day did the Paramecium aurelia population reach the carrying capacity of the environment? How do you know?On what day did the Paramecium caudatum population reach the carrying capacity of the environment when it was grown alone? How do you know?Explain the differences in the population growth patterns of the two Paramecium species when grown alone. What does this tell you about how Paramecium aurelia uses available resources?Describe what happened when the Paramecium populations were mixed in the same test tube.Explain how this experiment demonstrates that no two species can occupy the same niche. ................
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