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People who made mariner's compass for th...

People who made mariner's compass for the first time.

A

Indians

B

Europeans

C

Chinese

D

Egyptians

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Knowledge Check

  • Scientist who described chromosomes for the first time is………………………………………

    A
    Robert Brown
    B
    Anon Van Leeuwenhoek
    C
    Boveri
    D
    Anton Schneider
  • Scientist who described chromosomes for the first time is ___

    A
    Robert Brown
    B
    Anton van Leeuwwenhoek
    C
    Boveri
    D
    Anton Schneider
  • People who have migrated from the planes to an area adjoining Rohtang Pass about six months back

    A
    Have more RBC’s and their haemoglobin has a lower binding affinity to `O_2`.
    B
    Are not physically fit to play games like football
    C
    Suffer from altitude sickness with symptoms like nausea, fatigue, etc.
    D
    Have the usual RBC count but then haemoglobin has very high binding affinity to `O_2`.
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    In a survey of 60 people, it was found that 25 people read newspaper H, 26 read newspaper T, 26 read newspaper I, 9 read both H and I, 11 read both H and T, 8 read both Tand I, 3 read all three newspapers. Find i. the number of people who read atleast one of the newspapers. ii. the nuber of people who read exactly one newspaper.