GAS EXCHANGE IN PLANTS (3) STOMATA(GUARD CELLS)

Question 1

Where is the stomata located?

Answer 1

lower epidermis of leaves

Question 2

What are stomata surrounded by?what do they do?

Answer 2

• -) pair of guard cells that control the opening and closing of the stomata
• -)depending on how turgid or flaccid they are

Question 3

What happens to the guard cells when the stomata is open?

Answer 3

photosynthesises and makes glucose

Question 4

What happens to the water concentration in the guard cells when it photosynthesises?

Answer 4

Water concentrations will lower and therefore the cells will absorb more water by osmosis and become turgid

Question 5

What happens to the guard cells when they are turgid?

Answer 5

Thin outer walls will curve

thicc inner walls

Question 6

What happens to the guard cells when the stomata closes?

Answer 6

• )will NOT photosynthesises
• )glucose used up and stored as starch
• )thin outer walls will straighten

Question 7

What happens to the guard cells water concentration when the stomata closes?

Answer 7

increases, and therefore looses water by osmosis and become flaccid

Question 8

Does gas exchange happen when the stomata is closed or open

Answer 8

open