Www.mercerislandschools.org



Name:___________________________________________Date___________ Period ________364807518097500Virtual Lab: Population BiologyHow to get there- can link directly from the Ecology Subfolder on my website by opening the a copy of this document called “Virtual Population Lab” and clicking on the hyperlink: ( HYPERLINK "" ). Read the background information on the paramecium. One important thing to note is that these two microorganisms do not feed on each other, but they do eat the same type of food (rice in this case).1. What are the objectives for this experiment? ?Follow the directions to view the population sizes for the 3 different tubes (1 with P. aurelia alone, 1 with P. caudatum alone and one with both species.) To make it easier to share the counting with your table partner, click on the “Grid On” button on the microscope so that the microscope view will be divided into sections. Data TableP. aurelia grown alone, cells/mLP. caudatum grown alone, cells/mLP. aurelia grown in mixed culture, cells/ mLP caudatum grown in mixed culture, cells/mLDay ODay 2Day 4Day 6Day 8Day 10Day 12Day 14Day 163. Make a graph of the data using the graph paper at the end of this packet. Be sure to have the responding (dependent) variable on the vertical axis, to include units and have even increments for your scale. Your graph will have four lines (draw best fit curves for each set of data). Be sure to include a key to distinguish between the different groups.4. Explain how you tested your hypothesis. ?5. On what day did the Paramecium caudatum population reach the carrying capacity of the environment when it was grown alone? How do you know (relate your answer to the graph). ??6. On what day did the Paramecium aurelia population reach the carrying capacity of the environment? How do you know??7. Explain the differences in the population growth patterns of the two Paramecium species. What does this tell you about how Paramecium aurelia uses available resources??8. Describe what happened when the Paramecium populations were mixed in the same test tube. Do the results support the principle of competitive exclusion? (You may need to research the meaning of competitive exclusion using your iPads.)?9. Explain how this experiment demonstrates that no two species can occupy the same niche.?? ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download