Class IX

Windpipe is referred to
  1. larynx
  2. trachea
  3. glottis
  4. epiglottis
According to surveys, most young people smoke in order to
  1. overcome jealousy
  2. cover for their failures and weaknesses
  3. give an impression of adulthood and maturity
  4. give an impression of happiness and success
Dry mass is lost through
  1. lenticels
  2. respiration
  3. stomata
  4. limiting factor of enzymes
To induce sleep, narcotic drugs taken may include
  1. heroin
  2. opium
  3. morphine
  4. morphine
Enzyme required to convert polypeptides to amino acids is
  1. maltase
  2. pepsin
  3. erepsin
  4. diastase
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