Introduction to Environmental Science, 2017 Exam 1 Name: 49. Producers require o

Question

Introduction to Environmental Science, 2017 Exam 1 Name: 49. Producers require organic matter as their source of food 50. Consumers use the sun as an energy source for photosynt 51. Decomposers use nonliving matter as their source of energY 52. Each step in the flow of energy through an ecosystem True or False True or False True or False is known as a trophic level. True or False 53. Nutrient cycles involve biological, geologicaland chemical processes 54. In the Carbon Cycle, producers use respiration to produce complex organic True or False molecules True or False 55. In the Nitrogen Cycle, bacteria, not plants, perform the difficult chemical conversions. True or False 56. In the Phosphorus Cycle rock is the ultimate source of phosphorus atoms. 57. Primary succession begins with the disturbance of an existing ecosystem. 58. In aquatic primary succession, wet meadows dry out and then steps for terrestril True or False True or False True or False steps are followed 59. The modern concept of succession and climax communities states that the only thing True or False differentiating them is their time scale. 60. Biomes are determined by climate. 61. Desert biomes are always hot and dry. 62. Savanna has largely been spared from human impact. 63. The shore substrate determines the benthic organisms that can live there. 64. Estuaries are not adversely affected by fertilizers and animal wastes from farms. True or False True or False True or False True or False True or False True or False 65. Oligotrophic lakes are deep, cold and nutrient poor. True or False 66. BOD stands for biochemical oxygen demand. True or False 67. Corals contain algae that carry on respiration. 68. Mangrove swamps have climate identical to the savanna biome. 69. Trees in mangrove swamps do not tolerate salt well. True or False True or False

Explanation / Answer

49. Producers require organic matter as their source of food. (False)

Because producers use sunlight for photosynthesis as their source of food.

50. Consumers use the sun as an energy source for photosynthesis. (False)

51. Decomposers use nonliving matter as their source of energy. (True)

52. Each step in the flow of energy through an ecosystem is known as trophic level. (True)

53. Nutrient cycles involve biological, geological and chemical process. (True)

Because nutrients cycles involve not only living organisms, but non-living components

54. In the Carbon cycle, producers use respiration to produce comples complex organic molecules. (False)

55. In the Nitrogen Cycle, bacteria, not plants, perform the difficult chemical conversions. (True)

56. In the Phosphorus cycle rock is the ultimate source of the phosphorus atom. (True)

57. Primary succession begins with the disturbance of an existing ecosystem. (True)

58. In aquatic primary succession, wet meadows dry out and then steps for terrestrial steps are followed. (True)

59. The modern concept of succession and climax communities states that the only thing differentiating them is their time scale. (True)

60. Biomes are determined by climate. (False)

The distinguishing features of terrestrial biomes are determined mainly by climate, and climate ultimately influence the distribution of organisms.

61. Desert biomes are always hot and dry. (False)

62. Savanna has largely been spared from human impact. (True)

63. The shore substrate determines the benthic organisms that can live there. (True)

64. Estuaries are not adversely affected by fertilizers and animal wastes from farms. (False)

65. Oligotrophic lakes are deep, cold and nutrient poor. (True)

66. BOD stands for biochemical oxygen demand. (True)

67. Corals contain algae that carry on respiration. (True)

68. Mangrove swamps have climate identical to the savanna biome. (True)

69. Trees in mangrove swamps do not tolerate salt well. (False)

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