Class IX

Bracts are commonly found in
  1. Orchids
  2. Clitoria
  3. Pawpaw
  4. Grasses
When body temperature rises, several mechanism help in loosing heat but mechanism that helps in reducing heat production is
  1. reduced breathing
  2. reduced rate of metabolism
  3. excessive sweating
  4. excessive vasodilation
Through enzyme pepsin, proteins can be changed to
  1. polypeptides
  2. cellulose
  3. amino acids
  4. fatty acids
Meningitis results from meninges become affected through
  1. virus
  2. bacteria
  3. fungi
  4. both A and B
Chronic bronchitis and emphysema are more vulnerable to
  1. acid rains
  2. water pollutants
  3. smog
  4. nitrogen oxides
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