ECOLOGY
CHEMICAL CYCLES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Phosphate is incorporated into sedimentary rocks
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Phosphate bound to soil
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Atmospheric phosphate
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Phosphate is absorbed from the soil by plants
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Detailed explanation-1: -Phosphorus is absorbed by the organic matter in the soil which is used for various biological processes. Since phosphorus and phosphorus-containing compounds are present only on land, atmosphere plays no significant role in the phosphorus cycle.
Detailed explanation-2: -The phosphorus cycle does not include a gaseous phase, resulting in no significant quantities of atmospheric phosphorus. Explanation: The phosphorus cycle does not contain an atmospheric phase, while both the sulfur and nitrogen cycles do.
Detailed explanation-3: -Unlike the compounds of other matter cycles phosphorus cannot be found in air in the gaseous state. This is because phosphorus is usually liquid at normal temperatures and pressures. It is mainly cycling through water, soil and sediments. In the atmosphere phosphorus can mainly be found as very small dust particles.
Detailed explanation-4: -Phosphorus moves in a cycle through rocks, water, soil and sediments and organisms. Over time, rain and weathering cause rocks to release phosphate ions and other minerals. This inorganic phosphate is then distributed in soils and water. Plants take up inorganic phosphate from the soil.