Question

Which of the following is used to measure the growth in elongation?

• A. Potometer
• B. Porometer
• C. Horizontal microscope
• D. Clinostat

Answer 1

The correct option is C Horizontal microscope

A. Potometer is a device which is used to measure the rate of transpiration.

B. Porometer is a device which is used to measure the size of stomata.

C. Horizontal microscope, also known as travelling microscope, is a device used to measure the rate of elongation.

D. Clinostat is a device which is used to study the effects of external factors like gravity on plant's growth.

So, the correct answer is 'Horizontal microscope'.