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 s3. Nutrient cycles involve biological, geological and chemical processes. 54. In the Carbon Cycle, producers use respiration to produce complex organic True or False molecules True or False 5S. In the Nitrogen Cycle, bacteria, not plants, perform the 56. In the Phosphorus Cycle rock is the ultimate source of phosphorus atoms. 57. Primary succession begins with the disturbance of an existing ecosystem. difficult chemical conversions. True or False True or False True or False In aquatic primary succession, wet meadows dry out and then steps for terrestrial 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. True or False True or False True or False True or False True or False 63. The shore sobtrate etermines the benthic orentans that can e 64. Estuaries are not adversely affected by fertilizers and animal wastes from farms. 65. Oligotrophic lakes are deep, cold and nutrient poor. 66.B0D stands for biochemical oxygen demand. 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 True or False True or False True or False

Explanation / Answer

49. True. Producer make their own food and produce organic matter from inorganic material.

50. False. Consumer feed on other living animals for the energy.

51. True. Decomposers get nutrients and energy by breaking down dead organisms and animal wastes.

52. True. Tropic level is a step in the flow of energy through an ecosystem.

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