Question

Choose the correct answers from the alternatives given.
What is the action spectrum of transpiration?

• A. Blue and infra red
• B. Green and ultraviolet
• C. Orange and red
• D. Blue and red

Answer 1

The correct option is D Blue and red

An action spectrum is a graph of the rate of a physiological activity plotted against the wavelengths of light. it shows which wavelengths of light is most effectively used in a specific reaction. In photosynthesis, chlorophyll is much more efficient at the blue and red wavelengths of light to carry out photosynthesis. Since transpiration is indirectly related to photosynthesis, its action spectrum would be similar to photosynthesis.

Hence, the correct answer is 'Blue and red'.