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Explanation:
(2) all plants give out oxygen at day time and carbon dioxide at night because of the respiratory and nutrition system of plants
(1) This is an incorrect statement. All plants carry on respiration throughout 24 hours and thus give out carbon dioxide during the day as well as night. But photosynthesis happens only in presence of sunlight and so nd carbon dioxide during night
(2) The guard cells regulate the opening and closing of stomatal pores by the osmosis process. When water flows into the guard cells, they swell up and the curved surface causes the stomata to open. When the guard cells lose water, they shrink and become flaccid and straight thus closing the stomata
(3) Plant kept in continuous light will live longer, because it will be able to produce oxygen required for its respiration by the process of photosynthesis.
(5) If plant is releasing carbon dioxide and taking in oxygen during the day, it means that respiration is happening in plant. But it does not mean that photosynthesis is not happening. ... Respiration is independent of photosynthesis.
(4) Plant kept in continuous light will live longer, because it will be able to produce oxygen required for its respiration by the process of photosynthesis.
(6) When the water reaches the fish via its mouth, the dissolved oxygen is taken inside and the carbon dioxide is released. - When fishes are taken out of the water, the supply of oxygen to the fish is reduced as they cannot respire using the oxygen present in the atmosphere. Thus, they will die when taken out of water.
(7) Autotrophs are organisms that prepare their own food through the process of photosynthesis, whereas heterotrophs are organisms that cannot prepare their own food and depend upon autotrophs for nutrition.”
(8) Nutrition is required for an organism for the following purposes: Nutrition is necessary for the growth of new cells and the replacement or repair of worn-out cells. Nutrition gives energy for different metabolic processes in the body. Nutrition is required to produce resistance against different diseases.
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