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Synthesis of the active hormone formed from vitamin D or its precursor in skin.
Photosynthetically active radiation (PAR) diminishes substantially with passage through the canopy o
Mutualistic associations between fungi and plant roots: (a) arbuscular mycorrhizal fungus stained so
Two general models for the interconversion of inactive and active forms of a protein during cooperat
Fungi
The sandworm (Nersis) is an active predator that burrows in marine mudflats