plant transport

Question 1

Xerophytes

Answer 1

=plants well adapted to live in dry air conditions

Question 2

Xerophyte adaptations

Answer 2

rolled leaves
-reduces leaf area exposed to air and so reduces transpiration
sunken stomata
-reduces water potential gradient between inside leaf and outside so reduces rate of diffusion out
hairs
-trap water vapour and reduce water potential gradient
thick cuticle
-wax is waterproof so reduces transpiration

Question 3

Hydrophyte

Answer 3

grow partially or wholly submerged in water

Question 4

Hydrophyte adaptations

Answer 4

no lignified support tissues 
-it's a supportive medium
poorly developed xylem 
-as surrounded by water
little or no cuticle
-no need to prevent water loss
stomata on upper surface
-lower surface in the water
large air spaces
-buoyancy, reservoir for CO2

Question 5

Mesophytes during unfavourable time of year

Answer 5

• shed leaves before winter so reduce transpiration
• aerial parts die off in winter so not exposed (underground organs survive)
• dormant seeds over winter so no water required