(F) Plants and their environments Flashcards
What is photosynthesis?
The process where plants used light, water and carbon dioxide to create oxygen and energy (glucose)
Where does photosynthesis occur?
Photosynthesis occurs in the chloroplasts that sits in the mesophyll of the leaves
What is a mesophyll?
The inner tissue of a leaf
What is the word equation of photosynthesis?
Carbon dioxide + Water → Glucose + Oxygen + Water.
What is the symbol equation of photosynthesis?
6CO(2) + 6H(2)O → C(6)H(12)O(6) + 6O(2)
What are the factors that affect photosynthesis?
- Human effects – trampling, pollution, deforestation
- Soil pH and aeration
- Carbon dioxide concentration
- Light intensity – shaded and unshaded areas
- Temperature
- Presence of water – moisture and rainfall
- Mineral ions
- Competition – intraspecific and interspecific
How do humans affect photosynthesis?
Humans can help improve the growth of plants or maintaining them by watering them and placing them in the optimum environment
Humans can also affect photosynthesis by damaging the plant itself or the environment it is in
How does the pH of soil affect photosynthesis?
Plant grow best with a pH between 4.5 and 7.5
Acidic soil can mean there is a lack in nutrients
What is aeration?
The introduction of air
How does aeration affect photosynthesis?
Soil aeration is necessary to allow sufficient oxygen to get to the plant and for carbon dioxide to be removed
Toxins will also form if there is very little aeration such as hydrogen sulphide gas
How do most factors of photosynthesis affect photosynthesis and how long do they affect photosynthesis?
The higher the factor photosynthesis the higher the rate of photosynthesis
Any increases in the rate of photosynthesis will continue until it’s limited by another factor
How does the temperature affect photosynthesis and how long does it affect it?
As the temperature increases so does the rate of photosynthesis
This will continue until the enzyme responsible for the reaction denatures
What is competition?
When two organisms both require a resource in limited supply
What is intraspecific competition?
Competition that occurs between members of the same species
What is interspecific competition?
Competition that occurs between members of the different species?
