Plant cell organisation Flashcards
1
Q
Describe the epidermal tissue.
A
It covers the whole plant.
Covered with a waxy cuticle.
Reduces water loss by evaporation.
2
Q
Describe the palisade mesophyll tissue.
A
Has lots of chloroplasts so photosynthesis can happen rapidly.
3
Q
Describe the spongy mesophyll tissue.
A
Has lots of air spaces to allow gases to diffuse in and out of cells.
4
Q
Describe the stomata.
A
Tiny holes found in leaves which control water loss and gas exchange by opening and closing.
5
Q
Describe the guard cells.
A
They open and close the stomata allowing gas exchange and controlling water loss.
6
Q
When do the guard cells open?
A
When they have enough water.
Opening causes them to swell.
7
Q
When do the guard cells close?
A
When they want to reduce water loss.
Closing causes them to return to a limp state.
