Tag: conduction of water and minerals

Questions Related to conduction of water and minerals

Osmotic potential and pressure potential of three cells, a, b, c located in different parts of an actively transpiring plant are: 

Cell O.P (MPa) P.P. (MPa)
a -0.87 0.44
b -0.92 0.34
c -0.68 0.27

Which ones are root hair, root cortical and mesophyll cells respectively?

biology transport in plant transport of water and minerals conduction of water and minerals absorption of water and minerals in plants

  1. a, b, c

  2. a, c, b

  3. c, a, b

  4. b, c, a

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Correct Option: C
Explanation:

  • Osmosis occurs only through the semi-permeable membrane. Osmosis is a gradient dependent process, osmosis is different from diffusion as it is characterized by a semi-permeable membrane.
  • Net direction and rate of osmosis depend on both pressure gradient and concentration gradient.
So, the correct answer is 'c, a, b'.

Water absorption mainly occurs through the root-hair. 

biology transport in plant transport of water and minerals conduction of water and minerals absorption of water and minerals in plants

  1. True

  2. False

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Correct Option: A
Explanation:

The force of water absorption is created at the leaf end i.e transpiration pull. The water will enter the plant via the root cells that can be found in the roots.

Water absorbed by the roots reaches the leaves and is used in producing food for the entire plant.

biology transport in plant transport of water and minerals conduction of water and minerals absorption of water and minerals in plants

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

The leaves prepare food for the plant, using water and carbon dioxide during photosynthesis. The roots have root hair. The roots hair increase the surface area of the root for the absorption of water and mineral nutrients dissolved in the water.