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1 May, 16:03

A dam is built. As a result, the water flowing through a marsh stops completely. What is most likely to be an effect of this change?

A. Animals will take over the marsh when plants die.

B. Plant populations will thrive in the calmer marsh water

C. Photosynthesis rates will increase, boosting plant life

D. Oxygen levels will decrease, harming plants and animals

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  1. 1 May, 16:10
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    The correct option is D.

    The removal of water from the dam will reduce the amount of oxygen that can be dissolved in the water. The plants and the animals that live in the marsh need the oxygen gas to survive, thus the reduction in oxygen content of the water will have negative effects on the plants and the animals that live in the marsh.
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Home » Biology » A dam is built. As a result, the water flowing through a marsh stops completely. What is most likely to be an effect of this change? A. Animals will take over the marsh when plants die. B. Plant populations will thrive in the calmer marsh water C.
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