LABORATORY REVIEW
CELL RESPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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O2 increases
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O2 decreases
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O2 stays the same
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none of these are correct
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Detailed explanation-1: -The rate of photosynthesis in Elodea depends on the intensity of light. With increasing, water pollution levels light that reaches aquatic plants such as Elodea significantly decreases thus leading to lesser light intensity underwater (Denchak, 2018).
Detailed explanation-2: -Elodea leaves, when placed into water in a light environment, will remove CO2 from the water and produce glucose by photosynthesis. When CO2 dissolves in water, it combines with the water to form carbonic acid (H2CO3), making the water acidic (pH < 7).
Detailed explanation-3: -An elodea plant exposed to light will turn yellow bromothymol blue back to the blue color as it uses carbon dioxide.
Detailed explanation-4: -Elodea is an excellent oxygen producer and frequently used by fish to protect fry.