Dumping organic waste into a lake can lead to anaerobic conditions due to: a. Microorganisms consuming oxygen during aerobic respiration while breaking down the organic matter. b. Organic matter depleting the water's oxygen. c. The volume displaced by organic matter reducing the potential space for oxygen. d. Organic matter producing waste heat.
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The correct choice would be: a. Microorganisms consuming oxygen during aerobic respiration while breaking down the organic matter.
- Dumping organic waste into a lake introduces a large amount of organic material. Microorganisms in the lake break down this organic matter through the process of decomposition. During decomposition, microorganisms consume oxygen as they carry out aerobic respiration to break down the organic material. This increased microbial activity can lead to a reduction in dissolved oxygen levels within the water, creating anaerobic conditions as oxygen becomes depleted due to the breakdown of organic matter.