1. Why are some animals fed high protein foods ?
Answer
To increase or maximise growth.
2. What is "mycoprotein" ?
Answer
A protein-rich food from fungi.
3. Describe some factors that are threatening food security.
Answer
The increasing birth rate in some countries, changing diets in developed countries that lead to scarce food resources from developing countries being transported around the world, the emergence of new pests and pathogens that affect animals or crops, environmental changes that impact food production such as droughts or floods causing crop failure, the rising cost of agricultural inputs such as machinery, pesticides, or fertilisers, and conflicts in some parts of the world that affect the availability of water or food all contribute to growing challenges in global food security.
4. Suggest some disadvantages of intensively farming animals.
Answer
It is considered unethical and cruel to restrict the movement of animals or to prevent their natural behavior. Diseases can spread more quickly when animals are kept close together. Antibiotics are often added to food to prevent or treat disease, which can contribute to the development of antibiotic-resistant bacteria. Heating the buildings may also increase the use of fossil fuels.
5. Give some ways of maintaining fish stocks.
Answer
The introduction of fishing quotas, controlling net size, limiting the amount of fish that can be caught, reducing the times at which boats can fish, or restricting the total number of boats are all measures that can be used to manage fishing sustainably.
6. Glucose syrup is added to the fermenter. Give the reason why.
Answer
As a source of food or so the Fusarium can respire.
7. Suggest why the fermenter requires a cooling jacket.
Answer
To maintain the optimum temperature for Fusarium and to absorb the heat energy released during respiration.