If a leaf has chlorophyll but its stomata remain closed for a long time, what will most directly affect food formation?
Answer and explanation
Correct answer: Lack of carbon dioxide
Photosynthesis requires light, chlorophyll, water, and carbon dioxide. In this situation chlorophyll is present, and the question does not remove light or water. However, stomata are the main openings through which atmospheric carbon dioxide enters the leaf. Prolonged closure therefore lowers the carbon-dioxide supply and directly limits carbon fixation and food formation. Hence option B is correct; the other choices are not the immediate limiting factor described.
Frequently asked questions
What is the correct answer to this question?
Lack of carbon dioxide
Why is this the correct answer?
Photosynthesis requires light, chlorophyll, water, and carbon dioxide. In this situation chlorophyll is present, and the question does not remove light or water. However, stomata are the main openings through which atmospheric carbon dioxide enters the leaf. Prolonged closure therefore lowers the carbon-dioxide supply and directly limits carbon fixation and food formation. Hence option B is correct; the other choices are not the immediate limiting factor described.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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