Ecosystems L1.1

1. Ecosystems L1.1

2. Which best describes an abiotic limiting factor in a population? __________________ A animals B plants C water D food

3. Which best describes an abiotic limiting factor in a population? __________________ C water

4. Which best describes how coral reefs, forests, and ponds sustain animal populations? ___________________________________ A They provide resources animals need to survive. B They are found in areas where humans have little impact. C They provide a source of water from which animals can drink. D They are found in areas where temperatures are too high for plants to grow.

5. Which best describes how coral reefs, forests, and ponds sustain animal populations? ___________________________________ A They provide resources animals need to survive.

6. Which would most likely limit the growth of plants living in the desert? ______________________________A lack of water B high temperatures C high intensity of light D lack of photosynthesis

7. Which would most likely limit the growth of plants living in the desert? ______________________________A lack of water

8. Which is the most significant limiting factor in a desert ecosystem? ___________________________ A nutrients B predators C sunlight D water

9. Which is the most significant limiting factor in a desert ecosystem? ___________________________ D water

10. Which is the place where a member of a population lives and finds food? __________________________ A space B habitat C shelter D population

11. Which is the place where a member of a population lives and finds food? __________________________ B habitat

12. Which population would be most affected if there is a decrease in the population of aquatic insects? __________________________ A elk B frog C moose D squirrel

13. Which population would be most affected if there is a decrease in the population of aquatic insects? __________________________ B frog

14. All marine life from an intertidal zone has disappeared due to pollution. Which other species is most immediately affected by its absence? ______________________________ A deer B insects C shore birds D deep sea fish

15. All marine life from an intertidal zone has disappeared due to pollution. Which other species is most immediately affected by its absence? ______________________________ C shore birds

16. The diagram below shows the food web of a forest ecosystem. Which would be negatively affected by an increase in the beetle population? _________ A frog B grass C robin D snake

17. The diagram below shows the food web of a forest ecosystem. Which would be negatively affected by an increase in the beetle population? _________ B grass

18. Which most likely contributes to the growth of more plants in shallow waters of the ocean? _____________________________ A tides B sunlight C oil spills D warm currents

19. Which most likely contributes to the growth of more plants in shallow waters of the ocean? _____________________________ B sunlight

20. Which limiting factor most affects the population growth of plants in a garden? ______________________________ A space between plants B number of seeds planted C types of tools used in planting D number of people tending the plants

21. Which limiting factor most affects the population growth of plants in a garden? ______________________________ A space between plants

22. One way to decrease the number of flying insects on your property is to increase bat populations by building bat houses. In this case, which is most likely the limiting factor for the bat population? _______________________________ A food B space C water D shelter

23. One way to decrease the number of flying insects on your property is to increase bat populations by building bat houses. In this case, which is most likely the limiting factor for the bat population? _______________________________ D shelter

24. Estuaries often have marsh grasses that act as a safe nursery for young fish. Which limiting factor, provided by estuaries, does this describe? ____________________________ A food B space C shelter D predators

25. Estuaries often have marsh grasses that act as a safe nursery for young fish. Which limiting factor, provided by estuaries, does this describe? ____________________________ C shelter

26. Some caterpillars need big wide leaves to wrap up in when undergoing metamorphosis. Which is the limiting factor when there is a shortage of this kind of leaf? ___________________________ A food B shelter C space D water

27. Some caterpillars need big wide leaves to wrap up in when undergoing metamorphosis. Which is the limiting factor when there is a shortage of this kind of leaf? ___________________________ B shelter

28. As populations grow, they tend to spread out into new territory. Which limiting factor is most likely to become an issue? ________________________A food B shelter C space D water

29. As populations grow, they tend to spread out into new territory. Which limiting factor is most likely to become an issue? ________________________C space

30. An aquarist takes half of the fish out of a tank, and the remaining fish grow larger and are healthier. Which factor was most likely affecting the fish? ___________________________ A water B space C shelter D food

31. An aquarist takes half of the fish out of a tank, and the remaining fish grow larger and are healthier. Which factor was most likely affecting the fish? ___________________________ A water B space C shelter D food

32. An aquarist takes half of the fish out of a tank, and the remaining fish grow larger and are healthier. Which factor was most likely affecting the fish? ___________________________ B space

33. If the primary food source for the whale population in an area is depleted, which will most likely happen? ______________________________A The whale population will stabilize. B The whale population will increase. C Competition among the whales will increase. D Starvation will cause the whales to become extinct.

34. If the primary food source for the whale population in an area is depleted, which will most likely happen? ______________________________ C Competition among the whales will increase.

35. The graph below shows the relationship between available space in an ecosystem and a population of rabbits. How would the rabbit population be affected if land was cleared to build a housing development? ___________________________________ A The rabbit population would increase. B The rabbit population would decrease. C The rabbit population would remain stable. D The rabbit population would rise temporarily, then fall.

36. The graph below shows the relationship between available space in an ecosystem and a population of rabbits. How would the rabbit population be affected if land was cleared to build a housing development? ___________________________________ B The rabbit population would decrease.

37. The diagram below shows the feeding relationships between six organisms. Which organisms would most likely compete for food resources? _________________________________ R and S B. S and T T and W D. V and W

38. The diagram below shows the feeding relationships between six organisms. Which organisms would most likely compete for food resources? _________________________________ R and S

39. Wildlife corridors are areas where wildlife can travel between two natural areas that are separated by urban development, such as highways. The development of wildlife corridors is an attempt to decrease the effect of which factor? _______________________________ A excess predators B limited shelter C limited space D excess water

40. Wildlife corridors are areas where wildlife can travel between two natural areas that are separated by urban development, such as highways. The development of wildlife corridors is an attempt to decrease the effect of which factor? _______________________________ C limited space

41. Two tomato seeds are planted in soil in a 5-gallon container. Similarly, 8 tomato seeds are planted in soil in a second 5-gallon container. Assuming the seeds in both containers are kept at the same temperature and are provided with the same amount of water and sunlight, which most likely describes the tomato plants growing in each container after several months? ________________________________________ A The tomato plants in both containers will be much smaller than normal in size and produce no tomatoes. B The 2 tomato plants in the first container will be the same size and produce tomatoes of the same size as the 8 tomato plants in the second container. C The 2 tomato plants in the first container will be shorter and produce smaller tomatoes, while the 8 tomato plants in the second container will be taller and produce bigger tomatoes. D The 2 tomato plants in the first container will be taller and produce bigger tomatoes, while the 8 tomato plants in the second container will be shorter and produce smaller tomatoes.

42. Two tomato seeds are planted in soil in a 5-gallon container. Similarly, 8 tomato seeds are planted in soil in a second 5-gallon container. Assuming the seeds in both containers are kept at the same temperature and are provided with the same amount of water and sunlight, which most likely describes the tomato plants growing in each container after several months? ________________________________________ . D The 2 tomato plants in the first container will be taller and produce bigger tomatoes, while the 8 tomato plants in the second container will be shorter and produce smaller tomatoes.

43. Under which condition would a population most likely increase? A The carrying capacity exceeds the habitat area. B The number of deaths exceeds the immigration rate. C The number of deaths exceeds the number of births. D. The amount of available resources exceeds the carrying capacity.

44. Under which condition would a population most likely increase? D. The amount of available resources exceeds the carrying capacity.

45. The End