If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Biogeochemical cycles

AP.ENVSCI: ERT‑1 (EU), ERT‑1.D (LO), ERT‑1.D.1 (EK), ERT‑1.D.2 (EK), ERT‑1.D.4 (EK), ERT‑1.E (LO), ERT‑1.E.1 (EK), ERT‑1.E.3 (EK), ERT‑1.E.4 (EK), ERT‑1.F (LO), ERT‑1.F.1 (EK), ERT‑1.F.2 (EK), ERT‑1.G (LO), ERT‑1.G.1 (EK), ERT‑1.G.2 (EK)

Problem

Which of the following features contains the largest amount of phosphorus in the phosphorus cycle?
Choose 1 answer:
Choose 1 answer:
Stuck?
Stuck?