Which statement describes the phosphorus cycle steps?

Which statement describes the phosphorus cycle steps?

• A. Phosphate weathering from rocks yields phosphate; leaching offsets gains; in soil phosphate is absorbed on clay surfaces and organic matter particles and becomes incorporated (immobilized); plants dissolve ionized forms of phosphate; herbivores and carnivores obtain phosphorus by eating plants or animals; excretion; phosphorus is released back to the soil when plants or animal matter decomposes and the cycle repeats.
• B. Phosphorus cycles only in aquatic systems.
• C. Phosphorus is never absorbed by plants.
• D. Phosphate weathering from rocks yields phosphate; leaching offsets gains; in soil, phosphate is absorbed on clay surfaces and organic matter particles and becomes incorporated (immobilized); plants dissolve ionized forms of phosphate; herbivores and carnivores obtain phosphorus by eating plants or animals; excretion; phosphorus is released back to the soil when plants or animal matter decomposes and the cycle repeats.

Answer: (D)

The main idea being tested is how phosphorus moves through rocks, soil, plants, and animals in a cycle that involves weathering, immobilization, uptake, consumption, excretion, and remineralization. Phosphate released by weathering enters soil, where much of it binds to clay minerals and organic matter and becomes immobilized, temporarily unavailable to plants. Plants take up the ionized phosphate from the soil, and it moves up the food chain as herbivores and carnivores eat plant or animal matter. Phosphorus returns to the soil through excretion and, when organisms die or shed matter, decomposition releases phosphate back into the soil, allowing the cycle to repeat. Leaching can remove phosphate from the soil and transfer it to water bodies, linking terrestrial and aquatic systems. This sequence is correct because the cycle includes weathering, immobilization, plant uptake, trophic transfer, excretion, and mineralization back to the soil, and it recognizes that the cycle operates in both land and water without a significant atmospheric phase. The other statements either place the cycle only in aquatic systems or claim that plants do not absorb phosphorus, which are not accurate.

The main idea being tested is how phosphorus moves through rocks, soil, plants, and animals in a cycle that involves weathering, immobilization, uptake, consumption, excretion, and remineralization. Phosphate released by weathering enters soil, where much of it binds to clay minerals and organic matter and becomes immobilized, temporarily unavailable to plants. Plants take up the ionized phosphate from the soil, and it moves up the food chain as herbivores and carnivores eat plant or animal matter. Phosphorus returns to the soil through excretion and, when organisms die or shed matter, decomposition releases phosphate back into the soil, allowing the cycle to repeat. Leaching can remove phosphate from the soil and transfer it to water bodies, linking terrestrial and aquatic systems. This sequence is correct because the cycle includes weathering, immobilization, plant uptake, trophic transfer, excretion, and mineralization back to the soil, and it recognizes that the cycle operates in both land and water without a significant atmospheric phase. The other statements either place the cycle only in aquatic systems or claim that plants do not absorb phosphorus, which are not accurate.