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Question

Root Hair absorbs water from the soil through


A

Turgor pressure

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B

Ion exchange

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C

Osmosis

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D

DPD

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Solution

The correct option is C

Osmosis


The correct answer is option C.

Explanation of correct option:

  1. Water and minerals are absorbed by plants.
  2. With the aid of root hairs, salt is extracted from the soil.
  3. Osmosis is the method through which they absorb water.
  4. Osmosis is the passage of water molecules (solvent) via a semipermeable membrane from a lower concentration solution to a higher concentration solution.

Explanation of incorrect options:

Option A:

  1. Turgor pressure is the force that pushes the plasma membrane against the cell wall within the cell.
  2. It's also referred to as hydrostatic pressure.
  3. Turgor pressure actively occurs in the vacuoles of a plant cell.

Option B:

  1. The flow of cations (positively charged elements) and anions (negatively charged elements) through soils is known as ion exchange.
  2. Roots do not involve an ion exchange process to absorb materials from the soil.

Option D:

The diffusion pressure deficit (DPD) of a cell is the pressure difference between pure water and solution, or simply put, the cell's desire for water.

Final answer: Root Hair absorbs water from the soil through osmosis.


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