Question

Dumping of organic wastes into a lake may result in anaerobic conditions in the lake because
Select one:
a. some microorganisms use the organic matter to respire aerobically, reducing the oxygen content of
the water
b. organic matter absorbs the oxygen from the water
O c. the space occupied by the organic matter reduces the volume that could be occupied by the
oxygen
d. organic matter results in waste heat

Answer 1

Answer:

A.

Explanation:

Just took the test, and I was told A.

Answer 2

Dumping of organic wastes into a lake may result in anaerobic conditions in the lake because some microorganisms use the organic matter to respire aerobically, reducing the oxygen content of the water.

What do you mean by organic wastes?

• "Organic waste is any material that is biodegradable and comes from either a plant or an animal."

What do you mean by anaerobic conditions?

• It is a condition when the oxygen level decreases or disappear.
• Aerobic respiration- It is the process of respiration that takes place in the presence of oxygen gas to produce energy from food.

When organic wastes are dumped into lake, the microorganism starts decomposing it by utilizing the oxygen present in water. The disappearance of oxygen is faster than its production by photosynthesis. So, the lake will now have an anaerobic condition.

Hence, the correct option is a. some microorganisms use the organic matter to respire aerobically, reducing the oxygen content of the water."

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