2A Transpiration and Stomata

Question 1

how does the light intensity affect the rate of transpiration

Answer 1

brighter=faster. Photosynthesis can’t happen in dark so stomata close as they don’t need to be open to let co2 in-less water loss

Question 2

how does temp affect rate of transpiration

Answer 2

warmer=faster-more energy to evaporate

Question 3

how does air flow affect rate os transpiration

Answer 3

better air flow=faster-water vapour swept away so low concentration in air

Question 4

how does humidity affect the rate of transpiration

Answer 4

dier=faster- water vapour swept away so low concerntration in air

Question 5

how do you calc the rate of transpiration

Answer 5

mm moved / minutes

Question 6

whats the role of the stomata/guard cells in controlling gas exchange

Answer 6

two guard cells surround each stomata and when the plant has lots of water the guards cells fills up and go plump and turgid. The stomata opens so gases can be exchanged for photosynthesis. When plant is shot of water, guard cell becomes flaccid and closes stomata