Question

Select the correct option regarding the four statements.
(i) Instrument used to measure transpiration pull.
(ii) Instrument used to measure the size of stomata.
(iii) Instrument used to measure the pressure of the fluid.
(iv) Amount of osmosis per unit time.

• A. (i) - Potometer, (ii) - Manometer, (iii) - Porometer, (iv) - Osmometer
• B. (i) - Porometer, (ii) - Manometer, (iii) - Potometer, (iv) - Osmometer
• C. (i) - Monometer, (ii) - Potometer, (iii) - Porometer, (iv) - Osmometer
• D. (i) - Potometer, (ii) - Porometer, (iii) - Manometer, (iv) - Osmometer

Answer 1

The correct option is D (i) - Potometer, (ii) - Porometer, (iii) - Manometer, (iv) - Osmometer

• A potometer is a device used for measuring the rate of water uptake of a leafy plant shoot. The main reason for water uptake by a cut shoot is transpiration (evaporation in plants) and is affected by the transpiration stream.
• Porometer is an instrument for measuring the area of the stomatal openings of a leaf by the amount of a gas passing through a given area of it.
• Manometer is a device to measure pressures. A simple manometer consists of a U-shaped tube of glass filled with mercury.
• An osmometer is a device for measuring the osmotic strength of a solution, colloid, or compound.
  Hence, the correct match is (i) - Potometer, (ii) - Porometer, (iii) - Manometer, (iv) - Osmometer.