2. Questions Bank
  3. NEET
  4. Biology
  5. Biological Classification And System Of Classification / जैविक वर्गीकरण और वर्गीकरण की प्रणाली

NEET Biology Biological Classification And System Of Classification / जैविक वर्गीकरण और वर्गीकरण की प्रणाली Question Bank Cyanobacteria or Blue Green Algae

  • question_answer
    Which were the organisms who changed earth?s surface from reducing to the oxidizing             [BHU 2001]

    A)            Autotrophs                               

    B)            Heterotrophs

    C)            Photoautotrophs                     

    D)            Chemotrophs

    Correct Answer: C

    Solution :

                 Cyanobacteria appeared in precambrian period around 3.2 billion years ago and were the first to have oxygenic photosynthesis to evolve \[{{O}_{2}}\] in photosynthesis that caused conversion of primitive reducing atmosphere to present day oxidising atmosphere (oxygen revolution).


You need to login to perform this action.
You will be redirected in 3 sec spinner