Look at this first then answer the following. http://www.mhhe.com/biosci/genbio/
ID: 100180 • Letter: L
Question
Look at this first then answer the following. http://www.mhhe.com/biosci/genbio/virtual_labs_2K8/labs/BL_19/index.html
Make a hypothesis about how you think the two species of Paramecium will grow alone and how they will grow when they are grown together.
Explain how you tested your hypothesis.
On what day did the Paramecium caudatum population reach the carrying capacity of the environment when it was grown alone? How do you know?
On what day did the Paramecium aurelia population reach the carrying capacity of the environment? How do you know?
Explanation / Answer
1. Hypothesis: Under ideal conditions, the two species will grow normally when alone. However, when together the one that grows faster will wipe out the other one just by means of growing faster.
2. Testing of hypothesis: Samples of each of the two species of paramecium were placed in a culture for 16 days. Each species was first tested separately and then combined with the other. By observing the slides and cultures every two days we can easily visualize the growth in the population of the paramecium. The growth could be calculated by counting the number of each species on each slide.
3. According to the data collected, Paramecium Caudatum reached its carrying capacity on day 8. We have reache dto this conclusion since after this time the growth of P.caudatum was stopped. Therefore, it is evident that the population of P.caudatum reached a constant value.
4. The growth of Paramecium aurelia reached its carrying capacity on day 8. Same reasoning as for P.caudatum.
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