AP BIOLOGY

Detailed explanation-1: -1. What is oxygen cycle? The oxygen cycle is a biogeochemical cycle involved in the circulation of the oxygen atoms present in the earth through a series of intricate processes.

Detailed explanation-2: -The oxygen cycle is the biogeochemical cycle of oxygen atoms between different oxidation states in ions, oxides, and molecules through redox reactions within and between the spheres/reservoirs of the planet Earth.

Detailed explanation-3: -Biogeochemical cycles are basically divided into two types: Gaseous cycles – Includes Carbon, Oxygen, Nitrogen, and the Water cycle. Sedimentary cycles – Includes Sulphur, Phosphorus, Rock cycle, etc.

Detailed explanation-4: -Ecological systems (ecosystems) have many biogeochemical cycles operating as a part of the system, for example, the water cycle, the carbon cycle, the nitrogen cycle, etc. All chemical elements occurring in organisms are part of biogeochemical cycles.