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Plants give out carbon dioxide not only at night but during the day too. It happens because of the process of respiration in which plants take in oxygen and give out carbon dioxide. As soon as the sun rises another process called photosynthesis starts, in which carbon dioxide is taken in and oxygen is given out. 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 oxygen is released during daytime.
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A food chain is a series of organisms where all the organismsare dependent on next organism as a source of food. The series of organism take part at various biotic levels to form a food chain. Each step of the food chain forms a tropic level. ... Tertiary consumers (larger carnivores) form the fourth tropic level. A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another. In a food chain, each organism occupies a different trophic level, defined by how many energy transfers separate it from the basic input of the chain.
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Tanish Sharma 5 years, 2 months ago (9903833)
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