Multiple choice

Which of the following is used for determining the rate of transpiration in plants?

  1. Auxanometer

  2. Potentiometer

  3. Porometer

  4. Potometer

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A potometer measures transpiration rate by recording water uptake by a plant cut shoot - as water is lost through transpiration, an equal amount is absorbed, moving the air bubble in the capillary tube. Auxanometer measures growth, porometer measures stomatal opening, and potentiometer measures electrical potential.