Factors Affecting Transpiration Rate

Which of the following is not capable of speeding up the rate of transpiration in plants?

• increase in sunlight intensity
• increase in atmospheric carbondioxide
• increase in leaf temperature
• increase in wind speed

Transpiration is the loss of ……………………….from the …………………… of plants

• water, stem
• water, leaves
• water vapour, leaves

plants with large leaves will transpire faster than plants with smaller leaves. Which of the following explains why?

• plant with large leaves carry more water
• plants with large leaves have more stomata in their lower surface
• plants with large leaves have more stomata per unit area
• plants with large leaves blow readily in the wind

Which of the following can cause the stomata to open?

• increase in wind speed

• increase in humidity

• increase in light intensity

• decrease in temperature

Increased environmental temperature results in increased rate of transpiration because of ………………..

• increased kinetic energy of the water molecules in the leaf xylem
• increased evaporation of water from the substomatal air spaces
• increased diffusion of water vapour from the surfaces of the mesophyl cells
• increased evaporation of water from the surfaces of the mesophyl cells

Which of the following is not capable of speeding up the rate of transpiration in plants?

• increase in sunlight intensity

• increase in atmospheric carbon dioxide

• increase in leaf temperature

• increase in wind speed

Which of the following conditions will favor a faster rate of transpiration?

• decreased humidity and increased wind speed

• increased temperature and reduced wind speed

• reduced temperature and high light intensity

• increased humidity and reduced wind speed

Tick the factors affecting rate of transpiration.

• Temperature

• Surface area

• Light intensity

• Air humidity

• Wind

If the surrounding temperature become higher, plants will loss water _______ through the stoma

• faster

• slower

The faster the movement of air outside the leaf, the ________ the rate of transpiration.

• slower

• faster