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Biology Test 230

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Biology Test 230
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Weekly Quiz Competition
  • Question 1
    4 / -1

    The first step in photosynthesis is :

  • Question 2
    4 / -1

    What will be left if chlorophyll is burnt ?

  • Question 3
    4 / -1

    Cyclic photophosphorylation produces

  • Question 4
    4 / -1

    Cucurbitaceous plants are least affected by ringing because of :

  • Question 5
    4 / -1

    Which of the following bacterium is photosynthetic free living aerobic nitrogen fixer ?

    Solution

    The atmospheric nitrogen is not available to plants. There are some nitrogen fixing bacteria which converts atmospheric nitrogen into ammonia which is readily available to plants. Anabaena is a free-living as well as symbiotic nitrogen fixing bacteria. Clostridium is a free-living, anaerobic nitrogen fixing bacteria. Azotobacter are free-living, aerobic, and non-photosynthetic nitrogen fixing bacteria. Rhizobium is non free living symbiotic nitrogen fixing bacteria.

    Thus, the correct answer is 'Azotobacter.'

     

  • Question 6
    4 / -1

    ‘Kranz’ type anatomy is the characteristic of :

  • Question 7
    4 / -1

    Which of the following is a growth inhibitor

  • Question 8
    4 / -1

    The phenomenon of climacteric in a ripening fruit refers to

  • Question 9
    4 / -1

    Which among the following chemicals is used for causing defoliation of forest trees

  • Question 10
    4 / -1

    Under the following carbohydrate-nitrogen ratio condition, a plant produces flowers in

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