3️⃣Leaf Structure And Function 🌱 Flashcards
Why are roots are branched and spread out
2 reasons
- absorb water (and mineral salts) from a large amount of soil
- anchor the plant in the soil.
What helps root hair cells absorb lots of water?
2 features
- Thin walls
- Large surface area
Why are roots necessary?
Absorb water and minerals.
Large surface area in root cells
large vacuole and no chlorophyll
Why does a plant need a stem?
Transport system of the plant.
Xylem carries water up
Phloem transports glucose and nutrients around plant
Why does a plant need leaves 🍂
Carry out photosynthesis
Large surface area to capture sunlight
Lots of chloroplast in cells.
Why does a plant need flowers🌺
For reproduction
Why does a plant need the waxy cuticle
Transparent to allow light through
Waxy to prevent water loss from the leaf
Why does a plant need the epidermis
Stops bacteria and viruses entering leaf
Why does a plant need the palisade mesophyll
Photosynthesis occurs here
Cells packed with chloroplasts
Why does a plant need the spongy mesophyll
Some photosynthesis occurs here
Less chloroplasts than palisade
Why does a plant need the vein
Contains water in xylem
Food in phloem
Why does a plant need the guard cells
Increase and decrease in size to control size of the stomata
Why does a plant need the stomata
Small pores that allow gases in and out of leaf and how water is lost from the leaf
There are more stomata on the lower surface of the leaf
Explain how the below feature allows for efficient production of food
The leaf is flat and wide
so that they can absorb sunlight and have more stomata, that can take in carbon dioxide
Explain how the below feature allows for efficient production of food
The leaf is thin
to increase the surface area for absorption of light and carbon dioxide
