RAJASTHAN PMT Rajasthan - PMT Solved Paper-2008

  • question_answer
    Law of limiting factors was given by

    A)  Leibig                                  

    B)         Blackman

    C)         Calvin                                  

    D)         Arnon

    Correct Answer: B

    Solution :

    Liebig (1843), proposed the law of minimum which states that when a process, such as growth, is governed by anumber of separate factors, the rate of the process is limited by pace of slowest factor. Blackman (1905) extended the law of minimum to formulate the law of limiting factors which in his own words is when a process is conditioned as to its rapidity by a number of separate factors, the rate of the process is limited by the pace of slowest factor. Blackman also proposed the dark reaction of carbon assimilation, known as Calvin cycle or Blackman reaction. Calvin (1954; Nobel Prize winner) traced the path of carbon in photosynthesis. Arnon (1954) and others used radioactive \[C{{O}_{2}}\]  show carbon assimilation in chloroplasts. He also demonstrated cyclic and non-cyclic photophosphorylation.


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