Biology B Flashcards
Name three places CO2 is stored
Green plants
Peat bogs
Bodies of water.
What are the four main human causes for reduction if wildlife area?
Building
Farming
Dumping waste
Quarrying for metal ores
What is the main cause of global warming?
It is caused when heat from the sun is trapped in the atmosphere because of excess CO2 and methane.
What are the four main problems of deforestation?
More methane in the atmosphere
More CO2 in the atmosphere
Less CO2 taken in
Less biodiversity
What is fermentation and what does it produce?
Fermentation is where bacteria or yeast break sugars down by anaerobic respiration.
Yeast make the fuel Ethanol when they break down glucose by anaerobic respiration
Glucose -> Ethanol + CO2 + Energy
What is a biogas?
They are usually about 70% methane and 30% CO2
It is a gas made from biological elements
In detail what are the three ways food production efficiency can be improved
Reducing the number of stages in the food chain as there is less biomass and energy every time you move a stage up in the food chain so for a given area of land you produce a lot more food by growing crops instead of having grazing animals
Restricting the energy lost by farm animals by keeping them close together indoors in small pens so they are warm and can’t move about making it cheaper and they use less energy.
Developing new food sources such as Mycoprotein which is protein from fungi used to make meat substitutes such as quorn
List five problems with intensive farming
Some people think that forcing animals to live in unnatural and uncomfortable conditions is cruel
Crowded conditions of intensive farming are ideal for diseases to spread
Antibiotics given to animals can enter humans which allows the microbes to develop an immunity to the antibiotics
Animals need to be kept warm which burns fossil fuels
Fish stocks are getting low as they are being fed to animals that wouldn’t normally eat them
