题目内容
Sulfur exists in many oxidized and reduced forms cycle.
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Phosphorus cycle has no atmospheric pool.
Dissimilatory process is the transformation of organic form of elements back to inorganic form, such as respiration.
Photosynthetic efficiency is the percentage of the energy in sunlight that is converted to net primary production during the growing season
Only 5%– 20% of assimilated energy passes between trophic levels.
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