Gas Exchange Of Plant

Question 1

Role of stomata in gas exchange in light?

Answer 1

1.in light water enter guard cell by osmosis from surround epiderm cells
2.gaurd cell become turgid and swell
3.thick inner wall will split and gaurd cell bend outwards open stomata

Question 2

Role of stomata in gas exchange in dark?

Answer 2

1.in dark dark gaurd cell lose water
2.gaurd cell become flaccid
3.thick inner wall stick together close stomata

Question 3

Leaf structure and adaptions for gas exchange ?

Answer 3

1.airspaces to increase surface area for faster rate of diffusion
2.stomata open for diffusion of carbondioxide and oxygen and water vapour out of leaf
3.leaf thin for short diffusion distance increase diffusion of gases in and out leafs
4.leaves flat for large surface area to absorb carbondioxide during photosynthesis
5.gaurd cell control open and close of stomata to control gas diffusion

Question 4

Net exchange during night?

Answer 4

1.no light present
So no photosynthesis
2.oxygen diffuse into leaf and carbondioxide diffuse out in respiration

Question 5

Net exchange during day

Answer 5

.Respiration happen in all time
.There’s light so there’s photosynthesis (carbon dioxide taken by cell and oxygen produced)

Question 6

Gas exchange in relation to photosynthesis and respiration?

Answer 6

.carbondioxide and oxygen diffuse in and out of leaves through stomata
.carbondioxide used in photosynthesis and produced by respiration where oxygen used in respiration and produced in photosynthesis