Biology
Study the diagram given below and fill in the blanks with suitable words:
In order to prove that carbon dioxide is necessary for (a) …………… , a potted plant is placed in dark for 48 hours to (b) …………… the leaves. A part of a leaf is inserted into a conical flask containing potassium hydroxide solution. This is to absorb (c) …………… from the flask. The plant is then placed in sunlight for a few hours. The experimental leaf is tested for starch. The part of the leaf that was inside the conical flask turns (d) …………… , whereas the part of the leaf outside turns (e) …………… in colour.
Photosynthesis
ICSE 2024
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Answer
In order to prove that carbon dioxide is necessary for (a) photosynthesis , a potted plant is placed in dark for 48 hours to (b) destarch the leaves. A part of a leaf is inserted into a conical flask containing potassium hydroxide solution. This is to absorb (c) carbon dioxide from the flask. The plant is then placed in sunlight for a few hours. The experimental leaf is tested for starch. The part of the leaf that was inside the conical flask turns (d) brown , whereas the part of the leaf outside turns (e) blue-black in colour.
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