Question
What is necessary for photosynthesis?
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Solution
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Correct option is D)
- Photosynthesis is the making of food by plants. The essential ingredients in making this food are sunlight, the chlorophyll that is present in green plants, water and carbon dioxide in the air.
- Photosynthesis is necessary not just for plants to make food for themselves, but for animals, including us eventually.
Therefore, the correct answer is option D.
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A student carried out an experiment to investigate the conditions necessary for photosynthesis. He fixed leaf 'A' of a potted plant into a flask containing potassium hydroxide solution. He fixed another leaf 'B' of the plant into a flask containing water and wrapped the flask with a piece of black cloth. The plant was left in sunlight. After 6 hours he detached and tested both leaves for starch. Which of the following results most likely the student had found?
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