Transpiration using potometer 3.2 Flashcards
1
Q
Why is the plant cut underwater?
A
Stops entry of bubbles into xylem
2
Q
Why cut the last cm off at an oblique angle?
A
Increase the surface area for water absorption
3
Q
Why are the leaves of their shoot remain dry?
A
Prevent obstruction of stomata by water droplets
4
Q
Why use Vaseline to grease wall joints?
A
Give a tight seal - prevent air entering
5
Q
How is rate of transpiration calculated?
A
Measure distance travelled by bubbles
Measure radius of capillary
Find volume of water taken up
Divide volume by time
