Biology End Of Topic Test Flashcards
What is the equation for photosynthesis?
Carbon Dioxide + Water = Glucose + Oxygen
What does the stalk do?
To attach leaves to the plant
What do the veins do?
Transport substances (eg. Water & minerals - in xylem vessels , sucrose & amino acids - in phloem vessels) through the leaf
Why do leaves have surface area?
To collect as much sunlight as possible.
Why are leaves thin?
Helps transportation in the leaf.
Why are leaves green?
For photosynthesis
Carbon Dioxide
(Where it comes from, how it gets into the plant)
Comes from the air, diffuses through the leaf via the stomata
Water
(Where it comes from, how it gets into the plant)
Rain, absorbs through the roots
Glucose
(Where is goes or how it leaves the plant)
Made in leaves during photosynthesis
Oxygen
(Where is goes or how it leaves the plant)
Diffuses out through the stomata (tiny holes)
How are leaves adapted for quick diffusion of carbon dioxide?
- Lots of stomata
- Many air spaces within spongy layer
- Leaves are thin
What happens if a plant loses too much water?
It wilts
When might stoma be:
OPEN:
CLOSED:
OPEN: daytime - when it’s light
CLOSED: night - when it’s dark
Why might stomata close during the day?
If it’s hot, dry and/or windy because it loses too much water
What am I describing in these:?
Where chemical reactions occur:
Contains DNA that stores info to control the cell:
Contains cellulose to give the cell strength:
Contains cell sap to provide support:
Controls what goes in and out of the cell:
Contains Chlorophyll:
Where chemical reactions occur: Cytoplasm
Contains DNA that stores info to control the cell: nucleus
Contains cellulose to give the cell strength: cell wall
Contains cell sap to provide support: vacuole
Controls what goes in and out of the cell: cell membrane
Contains Chlorophyll: chloroplasts
