Gas Exchage In Plants

Question 1

Adaptations

Answer 1

Large SA to volume ratio leaves are broad and flat
Large number of stomata
Guard cells
CO2 via diffusion
Leaves are thin to provide short diffusion distance
Air movement around leaf
Large SA for mesophyll cells for rapid diffusion

Question 2

Reducing water loss

Answer 2

Rolled up leaves= moist air trapped
Small SA:volume= less water lost large diffusion distance
Thick cubicle-waxy= impermeable
Hairy leaves= trap moist air reduces water potential therefore water mobility
Reduced SA:volume o leaves= slower rate of diffusion