(c) Protozoa
      (d) Nematode
Ans: (b)
508. The normal temperature of human body on the Kelvin scale is
      (a) 280
      (b) 290
      (c) 300
      (d) 310
Ans: (d)
509. The stones formed in human kidney consist mostly of
      (a) calcium oxalate
      (b) sodium acetate
      (c) magnesium
      (d) calcium
Ans: (a)
510. Oxygen transportation in human body takes place through
        1) Blood
        2) Lungs
        3) Tissue
     The correct sequence of transportation is
      (a) 1, 2 and 3
      (b) 3, 1 and 2
      (c) 2, 1 and 3
      (d) 1,3 and 2
Ans: (c)
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