1. 1. Which of the following statements is supported by the graph. A
1. Which of the following statements is supported by the graph? A. The aphids eat the ants B. There are more ants than aphids at all times C. After 14 years the ant population goes extinct D. The aphid population grows more rapidly than the ant population #1

2. 2. Based on the graph, after 20 years the ant population would be expected to be closest to A. 60 B. 50 C. 120 D. 60,000 E. 120,000 #2

3. 3. Which of the following is a reasonable conclusion from the graph of aphid and ant populations A. An increase in the aphid population causes the ant population to grow B. An increase in the ant population causes the aphid population to grow C. There is a correlation (a relationship) between the ant and aphid populations D. There is no relationship between the ant and aphid populations
We’d need to do a controlled study to cause #3

4. #4 Possible Relationships
Predator/prey (more food= more growth) (but we would probably see more changes)
Mutualism – both species benefit each other
Commensalism – one species benefits, the other is unaffected
Mimicry – predators are scared of aphids because they look like ants
#4 Possible Relationships

5. #5 If we add more aphids, then the ant population will grow
If we remove the aphids, then the ant population will drop
If we do not allow the ants to eat the aphids, then the ant population will decrease
If we remove the aphids, then … #5

6. 6. Based on the graph, in what year does the lion population NOT grow
6. Based on the graph, in what year does the lion population NOT grow? A B C D E. The lion population grows every year #6

7. 7. If the trends continued past 1998, when would we expect the cheetah population to reach 0? A B C D E. 2020 #7

8. 8. The graph suggests the possibility of which type of inter-species relationship? A. Mutualism B.Mimicry C. Competition D.Commensalism
Growth of lion population seems to be lowering the cheetah population. Possibilities:
Lions eat cheetahs
Lions are parasites on cheetahs
Lions compete for the same resources #8

9. 9. Which of the following hypotheses would gain support from the above graph? A. Cheetahs eat lions – opposite could occur B. Cheetahs and lions occupy the same niche (compete for resources) C. Cheetahs and lions engage in a symbiotic relationship D. The lion population has reached it’s carrying capacity #9

10. 10. A biologists develops the hypothesis that the decreasing cheetah population allows the lion population to grow because there is more space available for lions to inhabit. Write a prediction that could be tested. Briefly describe a controlled experiment you could conduct.
If we limited the lions habitat, then the population would shrink
#10

11. 11. In the experiment above, which of the following was a control. A
11. In the experiment above, which of the following was a control? A. The amount of light that reached each tank – this is the experimental variable, being changed B. The oxygen saturation of each tank C. The temperature of each tank –it is the same in every trial D. The gender of the animals placed in each tank
#11

12. 12. Which of the following is a reasonable conclusion from the experiment? A. The more light a community is exposed to, the more its populations will grow B. The most productive amount of light exporsure for the community is 8 hours per day C. Extra light seems to help plants but harm animals D. Too much light must kill minnows.
#12

13. 13. What is the most likely explanation for the mass of the beta fish in the tanks exposed to less than 8 hours of light? A. There was not enough light for them to survive B. There wasn’t enough energy for them to survive – the 10% rule. Not enough minnows to support a beta fish C. There wasn’t enough oxygen for them to survive D. There wasn’t enough space for them to survive
#13

14. 14. If there were 2 beta fish in the 12- hour and 20-hour tanks, how many were likely in the 16 hour tank? A. 1 B. 2 C. 3 D. 4
2 fish have a mass of 1.5g (ish)
So each fish has a mass of 0.75g ish
If there are 2.4g in the tank…
Then there are probably about 3 fish with a mass of about 0.8g
#14

15. 15. Both scientists agree that A
15. Both scientists agree that A. Individual lions became faster during their lifetime B. Only the fastest lions can survive C. The fossil population changed over time into the modern population aka EVOLUTION! D. The more an antelope looks for lions, the better its eyes will get
#15

16. 16. A study shows that the more an individual uses their eyes,the worse their vision gets. This evidence would argue against the view of A. Neither scientist B. Scientist 1 C. Scientist 2 D. Both scientists
#16

17. 17. This situation is an example of which of the following. A
17. This situation is an example of which of the following? A. Mimicry B. Mutualism C. Succession D. Coevolution
The evolution of one species often affects evolution of another
#17

18. We’ll save this discussion for evolution
#18