Question

Complete the following statements by choosing the correct alternative out of those given in brackets.

_________is a device that measures rate of transpiration by a leafy shoot.

• A. hygrometer
• B. potometer

Answer 1

The correct option is B

potometer

The correct option is B

Explanation of the correct option :

1. Potometer or transpirometer is an apparatus or instrument using which the rate of transpiration can be measured.
2. There are several types of potometers – Farmer’s potometer, simple potometer, Ganong’s potometer.
3. The apparatus is made of glass, consisting of a long tube with a side tube, bent at right angles.

Explanation of the incorrect option:

Option A:

1. A device that is used to measure the moisture content of the air is called a hygrometer.
2. The relative humidity is measured in the air by a hygrometer.
3. The relative humidity is represented as a proportion; it represents the amount of humidity in the air, or vapor, to the maximum amount of humidity that the air can possibly contain.
4. On a scale of zero to 100, relative humidity is evaluated, the greater the value, the more moisture content in the air.

Final answer: Potometer is a device that measures the rate of transpiration by a leafy shoot.