AQA - Biology - Transpiration

What is the primary function of stomata in plants?

• To absorb nutrients from the soil

• To facilitate gas exchange

• To store water

• To produce glucose

Which of the following best describes the process of transpiration?

• The absorption of water by roots

• The loss of water vapour from the aerial parts of the plant

• The transport of nutrients through the phloem

• The conversion of sunlight into chemical energy

Which factor does NOT affect the rate of transpiration in plants?

• Light intensity

• Wind speed

• Soil pH

• Humidity

What role does the xylem play in the process of transpiration?

• It transports glucose from the leaves to other parts of the plant

• It transports water and minerals from the roots to the leaves

• It stores excess water

• It produces chlorophyll

Which instrument is commonly used to measure the rate of transpiration in plants?

• Thermometer

• Potometer

• Barometer

• Hygrometer

How does high humidity affect the rate of transpiration?

• It increases the rate of transpiration

• It decreases the rate of transpiration

• It has no effect on the rate of transpiration

• It causes the stomata to close

What happens to the stomata during the night in most plants?

• They open wider

• They close

• They remain unchanged

• They produce more chlorophyll

Which of the following conditions would likely increase the rate of transpiration?

• High humidity and low wind speed

• Low light intensity and high humidity

• High light intensity and high wind speed

• Low temperature and high humidity