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P, Q and R are the three gaseous components of air. Gases P and Q can dissolve in the waterof rivers, lakes and seas but gas R does not dissolve in water. The organisms S which live inwater use the gas P dissolved in water to make their food by the process of photosynthesis. Allthe organisms which live in water use the gas Q dissolve in water for releasing energy from food.Gas R is the major component of air.i) Identify the gases P, Q and R.ii) Name the organism S. |
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Answer» P- CARBON dioxide Q- oxygen R- Nitrogen S- aquatic PLANTS |
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