which gives leaves their green colour
Let's sum up the knowledge about photosyntesis
plants need carbon dioxide, water and sunlight to make their food
the food they make is called glucose
in addition to glucose, plants also produce oxygen
Why is photosynthesis important?
1. provides food and energy for animals
2. produces oxygen and removes carbon dioxide from the air
What did you learn from previous labwork in Spain?
Today we're going to continue with this topic and the aim of todays labwork is
The epidermis structure of the leaf
Vocabulary you have to know
monocots - monocotyledons - they have only one cotyledon in embryo, leaf veins are parallel, roots - taproot system (grains, daffodils, banana, onions, grass...)
dicots - dicotyledons - dicot embryo has two cotyledons, leaf veins are reticulated (branched), fibrous roots (legumes, lettuce, tomato...)
stomata - is a pore, found in the epidermis of leaves, that is used to control gas exchange
Stomata open and close to allow the intake of carbon dioxide and the release of oxygen.
Stomata open when there is sunlight. Therefore, stomata are usually open during the day and closed at night
Dicotyledons usually have more stomata on the lower epidermis than the upper epidermis.
Monocotyledons have the same number of stomata on the two epidermes.
Structure of the leaf