ECOLOGY
ORGANISMS AND THE ENVIRONMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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cuts off light to plants at the bottom.
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increases light to the plants on the bottom.
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causes dissolved Oxygen levels increase.
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causes bacteria populations decrease.
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Detailed explanation-1: -Some algae absorb and accumulate many heavy metals from the water. Thus the excessive growth of these algae in the water indicates pollution due to heavy metals.
Detailed explanation-2: -Algae can harm plants by stunting their growth. Using algae-affected water for irrigation can also affect the quality and appearance of plants. The algae in the water absorbs the nutrients meant for the plants, which will starve the plants of the food they need.
Detailed explanation-3: -The overgrowth of algae consumes oxygen and blocks sunlight from underwater plants. When the algae eventually dies, the oxygen in the water is consumed. The lack of oxygen makes it impossible for aquatic life to survive.
Detailed explanation-4: -Excessive algal growth consumes high amounts of dissolved oxygen and deprives the aquatic life of oxygen. It blocks the sunlight from entering the water and disrupts photosynthesis. Some algal blooms are considered harmful as they produce toxins that are detrimental to aquatic life.