P. aureliagrown alone, cells/mL – Make a hypothesis about

12 Jun P. aureliagrown alone, cells/mL – Make a hypothesis about

Question
P. aureliagrown alone, cells/mL

P. caudatumgrown alone, cells/mL

P. aureliagrown in mixed culture, cells/mL

P. caudatumgrown in mixed culture, cells/mL

Day 0

1

1

1

1

Day 2

6

4

4

6

Day 4

26

13

12

18

Day 6

44

26

33

10

Day 8

46

28

39

7

Day 10

46

28

44

3

Day 12

50

31

48

2

Day 14

49

31

48

0

Day 16

48

30

47

0

1. 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. Paramecium

2. Explain how you tested your hypothesis.

3. On what day did the Paramecium caudatum population reach the carrying capacity of the environment when it was grown alone? How do you know?

4. On what day did the Paramecium aurelia population reach the carrying capacity of the environment? How do you know?

5. 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?

6. Describe what happened when the Paramecium populations were mixed in the same test tube. Do the results support the principle of competitive exclusion?

7. Explain how this experiment demonstrates that no two species can occupy the same niche.

· Identify the Control group and Experimental Group

· Identify the Independent and Dependent Variables