Please enable JavaScript.
Coggle requires JavaScript to display documents.
B8 Photosynthesis - Coggle Diagram
B8 Photosynthesis
B8.2 The rate of photosynthesis
Enzymes and why a high temperature effects photosynthesis
Enzymes control photosynthesis. If the temperature is too high most enzymes are denatured and the rate of photosynthesis will fall
How the rate of photosynthesis will be effected with more than one limiting factor
Carbon Dioxide concentration
Needed to make glucose
Carbon dioxide concentration rises at night as light intensity and temperature increase in the morning most of the carbon dioxide concentration around the plant gets used up
Light
The brighter the light, the more photosynthesis. If the light is limited in some way, photosynthesis will stop
Inverse square law
The light intensity is directly linked to the distance from the light source
B8.3 How plants use glucose
Ways in which plants use glucose
Respiration
To make starch which is stored then used as energy
Make cellulose which makes the cell wall
Lipids - stored as energy in seeds
Chlorophyll - essential in photosynthesis
How and why plants convert glucose into starch for storage
Plants store some glucose as starch which is stored in the cells of the leaves. It provides an energy store when it is dark or in low light levels
Carnivorous plants are adapted to their environment
Some are adapted to live in nutrient-poor soil. They catch insects and get their nutrients from them. The plants produce enzymes to digest the insects they trap.
B8.4 Making the most of photosynthesis
How using greenhouses can help control limiting factors and increase the rate of photosynthesis
In a greehouse, factors of photosynthesis can be controlled. If you give plants a warm environment with plenty of light, carbon dioxide and water, they should grow quickly. Greenhouses are used because if the plants are growing out in a field, it is impossible to manipulate any of these factors.
Cost-effectiveness of greenhouses
Not very cost-effective because electricity and gas are used to maintain the lighting and temperatures and to control the carbon dioxide concentration. Expensive monitoring equipment and computers are used to maintain conditions inside the greenhouse as well.
Use of greenhouses and hydroponics in terms of economics
Not very cost-effective but less staff are needed, the time from seed to harvest is mych shorter, and the final crop is larger and cleaner.
B8.1 Photosynthesis
Adaptions of the leaf
Stomata have guard cells which regulates gas exchange
Broad and flat leaves, big surface area
The have veins which bring plenty of water and remove the products of photosynthesis
Why chlorophyll is needed
Absorbs light from the sun