what is photosynthesis?
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the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product
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By demographic features we mean the characteristics of population like, size, composition, diversity, growth and quality of population etc. To have basic understanding of the population problem of a specific country, one should have a complete knowledge regarding the basic features of population of that country.
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