Class X

In humans, urinary organ kidneys has length of
  1. 8 cm
  2. 10 cm
  3. 11.5 cm
  4. 13 cm
In humans, urinary system is formed of
  1. urethra
  2. urinary bladder and urethra
  3. pair of kidneys
  4. all of above
In humans, urinary system is also known as
  1. excretory system
  2. mineral absorption system
  3. salt absorption system
  4. blood oxygenation system
Considering normal urine composition, chloride ions content is
  1. 4.2g/l
  2. 1.87g/l
  3. 2.5g/l
  4. 3.6g/l
Plants that are adapted to sea water or salty water environment are called
  1. saprophytes
  2. hydrophytes
  3. xerophytes
  4. halophytes
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