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Opening and closing of stomata is due to the:

Gaseous exchange
Change in Turgor pressure of guard cells
Hormonal change in guard cells
Respiration
Additional Questions

Phenylmercuric acetate

Answer

If water enters in a cell, the pressure exerted by its swollen protoplast is

Answer

In soil, water available for plants is

Answer

Graham`s Law is correlated with

Answer

Due to low atmospheric pressure, the rate of transpiration will

Answer

With an increase in the turgidity of a cell, the wall pressure will

Answer

Transport of food material in higher plants takes place through

Answer

The transpiration is regulated by the movements of

Answer

The osmotic potential and pressure potential of three cells (A, B, C) located in different parts of an actively transpiring plant are given below:

CellOsmotic Potential (MPa)Pressure Potential (MPa)
A– 0.870.44
B– 0.920.34
C– 0.680.27

Identify these three cells as root hair, root cortical and leaf mesophyll cells respectively. The correct answer is

Answer

Passage cells are thin-walled cells found in:

Answer
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