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Question
Name the following:
The source of carbon dioxide for aquatic plants.
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Solution
Carbon dioxide dissolved in water
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Complete the following statement by choosing the correct alternative given below :
All animals would die on the earth if there was no ______.
Complete the following by filling the blanks 1 to 5 with appropriate words/terms/phrases:
To test the leaf for starch, the leaf is boiled in water to ______ (1). It is next boiled in methylated spirit to ______ (2). The leaf is placed in warm water to soften it. It is then placed in a dish and ______ (3) solution is added. The region which contains starch, turns ______ (4) and the region which does not contain starch, turns ______ (5)
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Given below is the representation of a certain phenomenon in nature. With four organisms 1-4.

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(1) boiled in water
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Complete the following sentence with appropriate word:
________ are regarded as complete photosynthetic units of plants.
Match the terms given in column A with column B:
| Column A | Column B | ||
| (a) | Chlorophyll | (i) | Removes/absorbs CO2 |
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| (c) | Potassium hydroxide | (iii) | Traps solar energy |
| (d) | Iodine solution | (iv) | Produces oxygen |
| (e) | Water | (v) | Bleaches chlorophyll |
