Definition of Transpiration

Let's work through the objective and descriptive questions related to plant transpiration based on this textbook page.

Let's start with the first question: Transpiration is best defined as which of the following options?

Transpiration refers specifically to the loss of water from the aerial parts of a plant in the form of water vapor. While evaporation happens, the physiological process in plants results in vapor loss. So, option b is the most accurate definition.

Now for question two. What are the characteristics of cobalt chloride paper that make it suitable for transpiration experiments?

Cobalt chloride paper is hygroscopic. Its key characteristic is that it changes color from blue to pink when it absorbs moisture or water vapor. This makes it an excellent indicator to detect the release of water from leaf surfaces.

Question three asks if substitute a single flower into a potometer instead of a leafy twig, will it serve the purpose of measuring transpiration?