Ecology and Human Impact Answer Key
1.
2.
3.
4.
5.
6.
7.
8.
4
1
1
Is not a question nothing to answer
2
2
1
2
9.
10. 3
11. 1
12. 4
13. 1
14. 3
15. 1
16. 1
17. 4
18. 2
19. 4
20. 3
21. 1
22. 3
There is no number on this question…….Oak trees
23. 2
24. 1
25. 4
26. 4
27. 1
28. 1
29. 4
30. 1
31. Level 1 because it has the highest bar in the graph
32. Level 4 is the top level consumers and there are fewer of those top level consumers than any
other organism or else the ecosystem would not be stable
33. 4
34. 1
35. The wolf population would decrease since there would be no food for the reindeer and they
would die, then there would be no food for the wolves
36. 4
37. 1 this is a repeat question sorry
38. 3
39. 2
40. No natural predators of the rabbits
41. No natural predators to hunt and kill them
42. Pass a law that makes it illegal
43. For any of the organisms you choose the answer is the same…. With no natural predators
their numbers grow in size so there is less food for the native species and the native species
die off
44. To eat the can beetles and save the sugar crops
45. Poisonous
46. The poison killed any organism that would eat them and the cane toads ate all of the food
available to the native organisms
47. The higher up the food chain the more poisons (toxins) there will be in an organism
48. Use something to help clean the poison out of the lakes, pass a law that makes it illegal to put
the toxins in the ecosystem
49. Creation of jobs, make money
50. No trees means no homes or food for the animals living there so they die
51. Trees use carbon dioxide for photosynthesis so if there are no trees then there is more carbon
dioxide in the atmosphere and carbon dioxide is the biggest greenhouse gas
52. 1
53. 2
54. 1
55. 1
56. 2
57. 3
58. 1
59. 2
60. 2
61. 1
62. 4
63. 1
64. The windmills are large, do not look nice, and they are noisy
65. It is a renewable resource so it is always around and it reduces our need for fossil fuels so
there will be less pollution
66. Running water, solar, wind
67. There is less pollution from these resources (this answer is for any of those you picked for 66)
68. Carbon dioxide, methane, carbon monoxide
69. Carbon dioxide or carbon monoxide: burning fossil fuels methane: wide scale animal farms
70. Loss of biodiversity and land as the ice caps melt
71. Less fossil fuels are used with more efficient lightbulbs so less greenhouse gases are
produced
72. Carbon dioxide, burning fossil fuels