Question

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Give one word for the following:

1). Initial uptake of water by the hydrophilic molecules of cell wall.

2). A solution containing lesser concentration than inside a cell.

3). The pressure responsible for keeping the stem upright.

Answer 1

Answer:

1. Diffusion

Explanation:

Diffusion

2.hydrocarbonon

3.tugor pressure

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Answer 2

1) Imbibition

2) Hypotonic solution

3) Turgor pressure

1) Initial uptake of water by the hydrophilic molecules of the cell wall- Imbibition.

• The hydrophilic compounds present in the root hair like the pectin and cellulose adsorp water through the process of imbibition.
• Imbibition is a type of diffusion in which solids and colloids adsorp water, which results in an increase in volume.
• Temperature, pressure, and pH of the medium are some factors that affect the rate of imbibition.

2) A solution containing a lesser concentration than inside a cell- Hypotonic solution.

• A solution that has less solute than the cell it is placed in is said to be hypotonic.
• When a cell is subjected to such hypotonic conditions, there is net water migration into the cell because the concentrations of dissolved solutes are lower outside the cell than inside and the concentration of water outside is correspondingly greater.
• A cell will enlarge and maybe burst if it is placed in a hypotonic solution with a solute.

3) The pressure responsible for keeping the stem upright- Turgor pressure.

• For stems to remain rigid and leaves to remain spread out toward the sun, plants must maintain their internal water pressure, also known as turgor pressure.

• Osmosis is the process that maintains the turgor pressure, or water pressure, that exists inside plant cells.

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