Chapter 27—Global Ecology and Human Impacts Key
1. What is most important for determining a biome’s boundaries?
2. Which of the following statements concerning biomes is FALSE?
3. Which biome is characterized by permafrost?
4. Low diversity in plant species, dwarf shrubs, and extremely slow regeneration after disturbance are typical of
the ____ biome.
5. Which biome is characterized by long, harsh winters and short summers when the sun doesn’t set?
6. Mosses and lichens are the dominant plants in the
7. Which biome is characterized by conifers and extremely cold winters?
8. Which is the world’s largest biome?
9. Which biome am I? The weather is cool, and there is high precipitation and dense fog.
10. Which biome am I? I am found along the northwest coast of North America and have coniferous evergreen
trees.
11. High precipitation, cool summers, mild winters, and an evergreen forest characterize the biome.
12. These two biomes are dominated by conifers:
13. Which biome is characterized by rich topsoil and broadleaf trees that lose their leaves in winter?
14. Hot summers and pronounced winters, moderate to high rainfall, and a dense canopy of broad-leaved trees
over saplings and shrubs characterize the ____ biome.
15. Which biome am I? I am also called prairie, steppe, veld and pampas.
16. This biome is so well suited to agriculture that few remnants survive, particularly in the United States.
17. Hot summers and cool to cold winters, low to moderate precipitation, and the best agricultural soils in the
world characterize the ____ biome.
18. The temperate grasslands
19. Which biome is characterized by thickets of evergreen shrubs and small trees?
20. This biome has what is called a Mediterranean climate.
21. Which biome am I? My plants often have sclerophyllous leaves.
22. The biome that can have enormous fluctuations of daily and seasonal temperatures is the
23. The biome generally receiving less than 25 centimeters (10 inches) precipitation per year is the
24. Sparse plant cover, small nocturnal animals, and exposed soils are typical of the ____ biome.
25. Which biome am I? I exist in two types: warm and cold.
26. Plants such as the Joshua tree and agave are characteristic of this biome.
27. The greatest assemblage and diversity of hoofed animals in the world occurs in the ____ biome.
28. The savanna is
29. In tropical rain forests
30. In a tropical rain forest, the majority of the mineral nutrients are present in
31. Daily precipitation, warm temperatures, and great species diversity characterize the ____ biome.
32. Which biome am I? Many of my plants are lianas.
33. Mineral-poor soil is typical of the ____ biome.
34. When climbing a mountain, you will most likely experience the same changes in vegetation as
35. Krummholz is found
36. One difference between arctic tundra and alpine tundra is that alpine tundra
37. A rain shadow
38. Species richness is defined as
39. A threatened species is different from an endangered species in that a threatened species
40. Which of the following is NOT a characteristic of endangered species?
41. Today, the extinction of most species is due to
42. Which of the following statements concerning invasive species is FALSE?
43. The most effective way to preserve species is to
44. Ex situ conservation
45. By definition, an area providing ecosystem services
46. Increases in the amount of ____ in the atmosphere may be a threat to the world because of the greenhouse
effect.
47. Which of the following is NOT classified as a greenhouse gas?
48. Global warming occurs because greenhouse gases
49. Which of the following is NOT a probable consequence of global warming?
50. A biome refers to a large aquatic region.
51. The Earth has a ring of deserts around the equator.
52. Tundra is the only biome that has permafrost.
53. The temperate grassland biome is so well-suited to agriculture that few remnants of the original vegetation
exist anywhere in the world.
54. Some savannas are being converted to deserts due to overgrazing of domestic livestock.
55. Tropical rain forests typically have dense vegetation at ground level.
56. Desert animals tend to be large.
57. Bands of vegetation types encountered from the base to the top of a mountain typically mimic the Northern
Hemisphere biomes encountered as you travel north.
58. Alpine tundra is the same in every way as arctic tundra.
59. Biodiversity encompasses species richness, genetic diversity, and ecosystem diversity.
60. An endangered species is one that will probably become extinct unless humans intervene.