Class XI

Pinus seeds cannot germinate without
  1. pressure
  2. water
  3. soil
  4. mycorrhiza
Generally, stomata
  1. Always open
  2. Always closed
  3. Open during night and close at day
  4. Open during day and close during night
Transport over longer distances proceeds through the vascular system
  1. Translocation
  2. Osmosis
  3. Transpiration
  4. Diffusion
A concept fundamental to understanding water movement is called
  1. concentration gradient
  2. Water potential
  3. pressure potential
  4. Solute potential
Passive water absorption by root system is due to
  1. Force created in root
  2. Osmotic pressure in shoot
  3. Tension in sap due to transpiration
  4. High respiratory activity of root
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