Lesson 2 - Looking At Leaves Flashcards
What are stomata?
Pores in the underside of leaves that allow carbon dioxide to diffuse in for photosynthesis.
What controls the opening and closing of stomata?
Two guard cells, which sit one on either side of each stoma.
What is the function of guard cells?
To regulate the opening and closing of stomata.
What gases diffuse in and out of a leaf through stomata?
Carbon dioxide and oxygen.
Fill in the blank: Water _______ from the cells inside the leaf into the leaf’s air spaces.
evaporates
What creates a concentration gradient between air inside and outside the leaf?
Water vapor diffusing out of the leaf.
Why are stomata primarily found on the underside of leaves?
To minimize water loss and protect from direct sunlight.
True or False: More stomata are found on the upper surface of the leaf.
False
What factors might affect the number of stomata on a plant?
Temperature, amount of wind, amount of available water.
How do guard cells affect the stomata when they are swollen?
They open the stomata.
What is the role of chloroplasts in leaves?
To carry out photosynthesis.
Fill in the blank: A single stomata is called a _______.
stoma
True or False: When the guard cells are full of water, they close the stomata.
False
What happens to the stomata in a dry environment?
More water would need to be saved from evaporation.
Where are most stomata located on a water lily leaf?
On the top side.
Why are stomata found on the top side of a water lily leaf?
Easier access to carbon dioxide; easier for oxygen to pass out.
True or False: Carbon dioxide is the only gas that diffuses through the stomata.
False
