Stomata And Transpiration

Question 1

What are stomata?

Answer 1

They are tiny pores on plant, allow CO2 and o2 to diffusion in and out , also allow water vapour to escape during transpiration

Question 2

What is transpiration a side effect of?

Answer 2

Of the way leaves do photosynthesis, more water inside plant then in air outside , the water escapes from the stomata by diffusion

Question 3

What happens to the stomata when the guard cells are turgid or flaccid?

Answer 3

The stomata are open when turgid guard cells,

The stomata are closed when flaccid Guard cells

Question 4

How does light intensity affect transpiration?

Answer 4

The brighter means more transpiration rate as stomata closed in dark , photosynthesis not in dark .

Question 5

How does temperature affect transpiration rates?

Answer 5

The warmer the faster transpiration , when warmer water has more energy to evaporate and diffuse out of the stomata

Question 6

How does air flow affect transposition rate?

Answer 6

Better air flow means more transpiration as the water moves around leaf quickly , and it is swept away.

Question 7

How do you estimate transpiration rate?

Answer 7

Use a potometer and then record the starting position

Then start a stopwatch and record the distance moved by the bubble per unit.

You can calculate the speed of air bubble movement gives an estimate of the transpiration rate.

Question 8

What does a photometer estimate?

Answer 8

Light intensity
Temperature
Air flow

But to get an accurate recording you must not change one variable at a time