Class IX

Lives of organisms in ecosystem become threatened due to
  1. urbanization
  2. industrialization
  3. introduction of toxics in ecosystem
  4. rapid housing
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
Energy pyramid is broader at base and narrower at apex, as energy
  1. increases along food chain
  2. decreases along food chain
  3. remains same along food chain
  4. may increase or decrease along food chain
All are parts of human gut, but,
  1. esophagus
  2. liver
  3. rectum
  4. colon
With split of testa, radicle emerges and grows
  1. upwards
  2. downwards
  3. perpendicular to sunlight
  4. parallel to sunlight
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