ECOLOGY
ENERGY FLOW AND PRIMARY PRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When multiple plants were put in the container, carbon dioxide concentration never got above 1, 000 ppm.
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When carbon dioxide concentration went from 800 to 1, 000 ppm the temperature in the container went up.
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Plants in the container kept in darkness did not lower the concentration of carbon dioxide below 800 ppm.
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When the container included a plant exposed to light, carbon dioxide concentration went from 800 to 600 ppm.
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Detailed explanation-1: -Carbon dioxide and rate of photosynthesis An increase in the carbon dioxide concentration increases the rate at which carbon is incorporated into carbohydrate in the light-independent reaction, and so the rate of photosynthesis generally increases until limited by another factor.
Detailed explanation-2: -Which of the following observations provides the best evidence that light is the source of energy for photosynthesis? Plants observed in artificial or in natural light were both seen to produce bubbles. The frequency of bubbling increases in bright light and slows to a stop in darkness.
Detailed explanation-3: -Since the plant is in an airtight container, the plant re-suses its water and carbon dioxide for both cycles. Photosynthesis and respiration will both occur. However, cellular respiration can occur any time, while photosynthesis needs light to start its process.