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Absorption of water - Basic

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As transpiration proceeds, water absorption occurs simultaneously to compensate the water loss from the leaf end. ... The water will enter the plant via the root cells that can be found in the roots where mainly passive absorption occurs. Also, with the absorption of water, minerals and nutrients are also absorbed.

Q1.  Which of the following factors affect the absorption of water by roots

  •  Soil temperature
  •  Soil aeration
  •  RH of the atmosphere
  •  All the above

All the above

Q2.  When water enters in roots due to diffusion, it is termed as

  •  Osmosis
  •  Endocytosis
  •  Active absorption
  •  Passive absorption

Passive absorption

Q3. Which of the following method is adopted by plant for the absorption of water when a cut shoot is fitted in a potometer

  •  Active
  •  Passive
  •  Partly both
  •  None of these

Passive

Q4.  Plants get which type of water from soil

  •  Hygroscopic water
  •  Capillary water
  •  Gravitational water
  •  All types of water dissolved in the solvent

Capillary water

Q5.  Holding capacity is highest in

  •  Clay soil
  •  Lome soil
  •  Silt soil
  •  Non-liberation of heat

Clay soil

Q6. The plant from which there is rapid transpiration, it will show

  •  Active absorption
  •  Passive absorption
  •  Active osmotic absorption
  •  Active non-osmotic absorption

Passive absorption

Q7. Why the roots of the plant die in the flooded condition of the soil

  •  Due to more absorption
  •  Due to more evaporation
  •  Due to more transpiration
  •  Root die due to absence of air

Root die due to absence of air

Q8.  When root pressure is more, which of the process will be rapid

  •  Absorption
  •  Transpiration
  •  Respiration
  •  None of these

Absorption

Q9.  The initial stage of water absorption by root cells is by

  •  Adsorption
  •  Absorption
  •  Osmosis
  •  Imbibition

Imbibition

Q10.  In many epiphyte (Orchid) plants which tissue is present in cortex of root and helps in water uptake

  •  Velamen
  •  Cork cambium
  •  Pericycle
  •  Medullary rays

Velamen



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