Transpiration Quiz

What is the process of water loss from the surface of aerial parts of plants called?

• Photosynthesis

• Condensation

• Transpiration

• Evaporation

Who first discovered transpiration in plants?

• Gregor Mendel

• Stephen Hales

• Charles Darwin

• Louis Pasteur

What percentage of total water loss from the plant is accounted for by stomatal transpiration?

• 30-40%

• 80-90%

• 50-60%

• 10-20%

Which type of transpiration occurs through the cuticle of leaves?

• Stomatal transpiration

• Cuticular transpiration

• Foliar transpiration

• Lenticular transpiration

What is the maximum contribution of cuticular transpiration to total transpiration?

• 10%

• 20%

• 5%

• 15%

Lenticular transpiration occurs through which part of the plant?

• Leaves

• Flowers

• Roots

• Fruits and woody stems

What is the role of guard cells in stomatal transpiration?

• To absorb water

• To open and close stomata

• To transport nutrients

• To photosynthesize

What happens to stomata at night?

• They disappear

• They expand

• They close

• They open

What is the first step in the mechanism of stomatal transpiration?

• Diffusion of water from leaf xylem to intercellular spaces

• Opening and closing of stomata

• Absorption of water by roots

• Diffusion of water vapour to atmosphere

What factors control the opening and closing of stomata?

• Nutrient availability

• Light intensity and temperature

• Soil moisture

• Wind speed