Question
Question: Which of the following instruments can be used to record the plant growth by seconds? A. Porometer...
Which of the following instruments can be used to record the plant growth by seconds?
A. Porometer
B. Potometer
C. Pressure bomb
D. Crescograph
Solution
The most important feature of any organism is growth. The cells of these organisms continue to divide which leads to the growth of these organisms. There are various instruments which are used to measure plant growth. We know that a porometer must be related to measuring the pores, the pressure bomb as the name suggests must be used to find the pressure.
Complete answer:
To know the correct answer to the question, we must be well aware of the various instruments.
Porometer is the device which is used to measure the number of pores or more precisely the porosity of the membrane. In this instrument the wetting liquid is displaced from the pores with the help of gases which are at high pressure.
Potometer is the device which is used to measure the amount of water uptake from the stem. This amount is in turn equal to the rate of transpiration. Transportation is the amount of water which is lost from the aerial parts of the plant in the form of water vapour.
Pressure bomb is also known as a pressure chamber or scholander chamber is used to measure the water potential inside the plant tissue. In this the leaf or the plant part is kept inside the chamber and pressurized air is allowed to pass through it. Due to the increasing pressure the liquid inside the xylem oozes out from the cut end. The pressure at which the water comes out is equal to the water potential of the plant.
Crescograph is a device that was invented by Sir Jagdish Chandra Bose. It is used to measure the growth of the plant.
Since, now we are well aware of all these instruments, therefore the correct answer to the question is Crescograph.
Note: Here it must be noted that crescograph consists of glass plate and clockwork gears. It can detect even the slightest change in the length of the plant. It can measure the change in length from 1/1000 to 1/10000 of an inch. The electronic crescograph is even more sensitive.