The phosphorus cycle differs from the biogeochemical cycles in that

Phosphorous cycles through several components of the biosphere, hydrosphere, and geosphere. however, it generally does not circulate through the atmosphere, unlike other biogeochemical cycles, like for example carbon or nitrogen.hope this ~

Can you add a picture of the question?

An autotrophic protist - they can perform photosynthesis and mainly consist of unicellular algae. they can be divided into number of systematic group according to the shape of their cell and the type of photosynthetic pigments they use.