2.3 MAIN ORGAN FOR TRANSPIRATION

The...... the light intensity, the ...... the rate of transpiration.

• higher, lower

• lower, higher

• higher, higher

• lower, constant

What is the environmental factor that affect the rate of transpiration shown in the Figure 2.2?

• Air movement

• Relative air humidity

• Temperature

• Light intensity

An increase in temperature increases the ...... of water molecules thus increasing the rate of transpiration.

• thermal energy

• gravitational energy

• kinetic energy

• chemical energy

Figure 2.10 shows the relative air humidity affects transpiration rate. It means

• The lower relative air humidity of the surrounding atmosphere, the faster water vapour escapes from the stomata.

• The higher relative air humidity of the surrounding atmosphere, the faster water vapour escapes from the stomata.

• The lower relative air humidity of the surrounding atmosphere, the slower water vapour escapes from the stomata.

• The higher relative air humidity of the surrounding atmosphere, the more water vapour escapes from the stomata.

All the facts stated are why transpiration required in plants except

• Water absorbs heat energy from leaves and evaporates as water vapour to give heating effect.

• Plants roots absorb water and mineral salts from soil.

• Produces a pulling force that moves the water and mineral salts continuously in the xylem vessels from the roots to all plant cells.

• Water absorbs heat energy from leaves and evaporates as water vapour to give cooling effect.

Which graph depicts the effect of humidity on the rate of transpiration?

• A

• B

• C

• D

Transpiration is a part of____________?

• Condensation

• Sublimation

• Evaporation

• Precipitation

What is the effect of increasing light intensity in transpiration?

• It decreases transpiration rates

• It increases transpiration rates

• It doesn't impact the rate of transpiration

Select all of the environmental factors that would increase transpiration.

• Increased humidity

• Increased wind speed

• Increased temperature

• Decreased surface area

What is the effect of increasing wind speed on transpiration?

• It increases transpiration rate
• It decreases transpiration rate