Gas exchange in dicotyledonous plants Flashcards
1
Q
What are the main structures of a typical leaf?
A
- Upper edermis with waxy cuticle
- Air spaces in mesophyll layer
- Mesophyll cells
- Stomata
- Lower epidermis
- Vascular tissue (xylem and phloem)
2
Q
Where does gas exchange occur in leafs of plants?
A
The stomata
3
Q
What are 2 adaptations of leaf structures?
A
Air spaces in the mesophyll layer - gases can diffuse in and out of the leaf quickly
Stomata open and closes - minimises water loss
4
Q
What are xerophytic plants?
A
Plants adapted to survive in environments with limited water
5
Q
What are 4 adaptations of xerophytic plants to minimise water loss?
A
Thick waxy cuticle - reduces water loss through evaporation
Curled / folded leaves - traps moisture
Hairs on leaves - traps moisture
Sunken stomata - reduces evapouration
