Question

Rate of transpiration is highest when

• A. Soil is wet and air is dry
• B. Soil is wet and air is humid
• C. Soil is dry and air is humid
• D. Both soil and air are dry

Answer 1

The correct option is A Soil is wet and air is dry

• Transpiration is the process of evaporation of water through aerial parts of the plant.
• The rate is high when the soil is wet and the air is dry.
• Since water moves from higher concentration to lower concentration so, for transpiration there should be more water in plants and less water in the air and the air should be dry.

So, the correct answer is 'Soil is wet, and the air is dry'.