Topic 2 Revision Guide Flashcards
Why is the upper epidermis transparent
-to allow light to pass through to the palisade layer
What does the palisade layer have lots of
Chloroplasts
What are the tissues in the leaves adapted for
For efficient gas exchange
What is the lower epidermis covered in
Stomata
What does the stomata do
Lets carbon dioxide diffuse directly into the leaf
What is the opening and closing of the stomata controlled by
Guard cells
What do the air spaces in the spongy mesophyll do
Increase the rate of diffusion of gases
What are the epidermal tissues with and why
A waxy cuticle which helps to reduce water loss by evaporation.
Palisade mesophyll tissue function is
Where photosynthesis occurs
What is transpiration caused by
The evaporation and diffusion of water from a plants surfaces
Where does most transpiration happen
In the leaves
How doe slight intensity affect transpiration rate
The higher the light, the greater the transpiration rate
What happens when stomata close
Wanted can’t escape
How does temperature affect the transpiration rate
The warmer it is, the faster the transpiration rate. When it is warm the water particles have more energy to evaporate and diffuse out of the stomata
When stomata open what happens
Gases can be exchanged for photosynthesis
