Factors affecting transpiration rate

By which process does a plant lose water to the atmosphere?

• osmosis

• photosynthesis

• translocation

• transpiration

How is the rate of transpiration changed by decreasing temperature and by decreasing light intensity?

• option A

• option B

• option C

• option D

A plant shoot is placed in a solution of a dye. The dye moves up the stem. Under which condition will the dye move fastest?

• high temperature, high humidity

• high temperature, low humidity

• low temperature, high humidity

• low temperature, low humidity

The table shows the rates of water absorption and transpiration of a plant during a morning. At what time does the plant show signs of wilting?

• 9 am

• 10 am

• 11 am

• 12 pm

Cacti have fewer stomata than other plants. How does this help cacti to survive in desert conditions?

• It increases loss of water.

• It increases uptake of carbon dioxide.

• It reduces loss of water

• It reduces uptake of carbon dioxide.