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State in brief about the Macronutrients
Each element is specific in its function in plant metabolism, however, the exact functions for a number of them are still not known. These essential elements exist as structural components of a cell, maintain cellular organisations, function in energy transformations and in enzyme reactions.
Carbon, hydrogen and oxygen form about 94% of the dry mass of plants. These elements are obtained from carbon dioxide and water which are converted to carbohydrates photochemically and ultimately transformed to protein and protopl asm. Besides their structural role, they provide energy required for the growth and development of plants by oxidative breakdown during cellular respiration. These elements, however, are not considered to be mineral nutrients.
LIGHT All of us know that the sun is the ultimate source of energy for all activities in our biosphere. The electromagnetic radiations from the sun supply energy which warms up t
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a) What is symbiotic nitrogen fixation? b) Name the two protein components required for this process. Define their role.
explain the role of cyclic photophosphorylation in photosynthesis
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How different are gymnosperms from pteridophytes and bryophytes? Gymnosperms are not cryptogamic as pteridophytes and bryophytes are. They are phanerogamic and so they form see
Cyanobacteria carry out photosynthesis using two photosystems as in green plants. Furthermore, other photosynthetic bacteria, like as the purple photosynthetic bacterium Rhodospiri
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