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  • Question
  • Ozone hole refers to


  • Options
  • A. hole in ozone layer
  • B. decrease in the ozone layer in troposphere
  • C. decrease in thickness of ozone layer in stratosphere
  • D. increase in the thickness of ozone layer in troposphere

  • Correct Answer
  • decrease in thickness of ozone layer in stratosphere 


  • Biology problems


    Search Results


    • 1. Pollination is best defined as

    • Options
    • A. transfer of pollen from anther to stigma
    • B. germination of pollen grains
    • C. growth of pollen tube in ovule
    • D. visiting flowers by insects
    • Discuss
    • 2. Pigmentation of skin is due to

    • Options
    • A. lymphocytes
    • B. monocytes
    • C. leucocytes
    • D. melanocytes
    • Discuss
    • 3. Oxyreductases, transferases, hydrolases, lyases, isomerases and ligases are all classes of

    • Options
    • A. hormones
    • B. enzymes
    • C. proteins
    • D. vitamins
    • Discuss
    • 4. Process of cell division can take place by

    • Options
    • A. heterosis
    • B. fusion
    • C. mitosis
    • D. None of these
    • Discuss
    • 5. One day you wake with a sore throat and a runny nose. Your doctor takes a swab from your throat, sends it to a lab, and telephones you the next day to say that antibiotic will not help you get better. Which of the following is the most likely reason for the doctor's statement?

    • Options
    • A. Having waited a day, it is too late to take an antibiotic
    • B. You need an antiseptic, not an antibiotic
    • C. You need to be vaccinated instead of taking an antibiotic
    • D. You are infected by a virus
    • Discuss
    • 6. Where is the Railway Staff College located?

    • Options
    • A. Pune
    • B. Allahabad
    • C. Vadodara
    • D. Delhi
    • Discuss
    • 7. Sun Temple is situated at?

    • Options
    • A. Konark
    • B. Bangalore
    • C. Haridwar
    • D. Kerala
    • Discuss
    • 8. 'Kanchipuram' is in which of the following states?

    • Options
    • A. Andhra Pradesh
    • B. Orissa
    • C. Kerala
    • D. Tamil Nadu
    • Discuss
    • 9. The world famous 'Khajuraho' sculptures are located in

    • Options
    • A. Gujarat
    • B. Madhya Pradesh
    • C. Orissa
    • D. Maharashtra
    • Discuss
    • 10. Which city is called 'White City' of Rajasthan?

    • Options
    • A. Bihar
    • B. Jaipur
    • C. Udaipur
    • D. Jodhpur
    • Discuss


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