Question

Match the different types of instruments listed under with their uses.

Instruments	uses
A. auxanometer	p. measurement of imbibition pressure
B. potometer	q. measurement of blood pressure
C. Dilatometer	r. measurement of transpiration rate
D. Sphygmomanometer	s. measurement of diffusion
	t. measurement of growth rate in plants

a) A-t, b-p, c-r, d-q
b) A-s, b-r, c-q, d-p
c) A-t, b-r, c-q, d-p
d) A-t, b-r, c-p, d-q

Answer 1

Hint: A dilatometer is a scientific method that calculates changes in volume produced by a process that is physical or chemical. The mercury-in-glass thermometer in which the volume shift of the liquid column is read from a graduated scale is a familiar use of a dilatometer.

Complete answer:
In terms of the elongation of the plant axis, the auxanometer is used to measure growth.
By measuring the rate of their water absorption, the potometer is an instrument for measuring the rate of transpiration by shoots, as the two are almost equal, e.g., the potometer of Ganong.
Imbibition pressure is the pressure that a swelling imbibant creates if the imbibant is held in a confined space. It is due to the adsorbent's matric potential present in hydrophilic colloidal particles.
The instruments used to calculate the imbibition pressure are dilatometers.
A system used to measure blood pressure is a sphygmomanometer. It consists of an inflatable cuff to limit the flow of blood and mercury or an electronic manometer to measure blood flow.

Additional information:
A sphygmomanometer is a device used to assess blood pressure, consisting of a blood pressure gauge, also known as a blood pressure monitor or blood pressure gauge, consisting of an inflatable cuff that collapses and then activates the artery under the cuff in a regulated manner.
A potometer also referred to as a transpirometer, is a device used to measure a leafy shoot's rate of water absorption, which is approximately equal to the water lost by transpiration. Photosynthesis and transpiration are sources of water absorption.

So, the correct answer is ‘A-t, b-r, c-p, d-q’.

Note:
In order to prevent excessive air bubbles in the xylem of the plant which can interrupt the transpiration stream, the potometer is set up underwater. To make it as airtight as possible, all joints are sealed with petroleum jelly. The potometer does not reliably calculate the rate of transpiration since not all of the water produced by the plant is used for transpiration. The potometer tests the rate of water uptake.