Class IX

All are parts of human gut, but,
  1. esophagus
  2. liver
  3. rectum
  4. colon
All are characteristics of energy, but,
  1. energy can not be created
  2. energy can not be destroyed
  3. energy can be converted from one form to other
  4. energy is never lost
Transference of food from one trophic level to next is
  1. accompanied with an energy gain
  2. accompanied with energy loss
  3. accompanied with macronutrients only
  4. accompanied with micronutrients only
When heart relaxes,
  1. person respires
  2. peristalsis movements occur
  3. bile is produced
  4. heart gets filled with blood
Lives of organisms in ecosystem become threatened due to
  1. urbanization
  2. industrialization
  3. introduction of toxics in ecosystem
  4. rapid housing
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