B2.3 - Photosynthesis Flashcards
What is the by-product of photosynthesis?
Oxygen.
Where does the carbon dioxide for photosynthesis come from?
The air.
Where does the water for photosynthesis come from?
The soil.
What absorbs the light energy for photosynthesis?
The chlorophyll in the chloroplasts.
What are the limiting factors of photosynthesis? (3)
- Temperature.
- Carbon dioxide concentration.
- Light intensity.
What do plants produce from nitrate ions absorbed from the soil?
Proteins.
What do plants use glucose for? (3)
- To store as fats in seeds.
- To produce cellulose, which strengthens the cell wall.
- To produce proteins.
- Respiration.
- To store as starch in roots.
How to greenhouses maintain their temperature?
Trapping the sun’s heat, using a heater or ventilation.
How to greenhouses maintain their light intensity?
Artificial light.
How to greenhouses maintain their carbon dioxide concentration?
Paraffin heaters.
How do fertilisers aid plant growth?
By providing all the necessary minerals.
How does keeping plants enclosed aid their growth?
They are separate from pests and diseases.
What is the word equation for photosynthesis?
Carbon dioxide + water —> Glucose + oxygen
