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During the water cycle, when rainwater drains through land layers, it carries sedimentary elements of which cycle to oceans?

Answer and explanation

Correct answer: Phosphorus cycle

Direct answer: B, the phosphorus cycle. Phosphorus is commonly stored in rocks and sediments rather than mainly in the atmosphere. Rainwater causes weathering and erosion of rocks. The released phosphate particles or dissolved phosphate are carried by surface runoff and groundwater into streams, rivers, lakes, and finally oceans. Aquatic organisms can take up some of this phosphate, while some settles again as sediment. A is not the best answer because nitrogen has a major atmospheric reservoir and is strongly linked with fixation and denitrification. C and D have important gaseous atmospheric forms and are not chiefly described as sedimentary cycles in this context. Memory cue: phosphorus is the classic sedimentary nutrient cycle with no major gaseous phase.

Related tags

Phosphorus CycleSedimentary CycleRunoffWeatheringHydrological CycleThe Living WorldBiologyClass 11 Mcq

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