How to study biology for NEET 2025? - Preparation & Revision Strategy For NEET Biology

Phosphorus Cycle MCQ - Practice Questions with Answers

Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET

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Phosphorus Cycle
  • Phosphorus is a major constituent of biological membranes, nucleic acids and cellular energy transfer systems. 
  • Many animals also need large quantities of this element to make shells, bones and teeth.
  • The natural reservoir of phosphorus is rock, which contains phosphorus in the form of phosphates. 
  • When rocks are weathered, minute amounts of these phosphates dissolve in soil solution and are absorbed by the roots of the plants. 
  • Herbivores and other animals obtain this element from plants. 
  • The waste products and the dead organisms are decomposed by phosphate-solubilising bacteria releasing phosphorus. 
  • The differences between carbon cycle and phosphorus cycle are:
    • Unlike the carbon cycle, there is no respiratory release of phosphorus into the atmosphere. 
    • The atmospheric inputs of phosphorus through rainfall are much smaller than carbon inputs.
    • The gaseous exchanges of phosphorus between organism and environment are negligible. 


 

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