Food security is when a population has enough food to stay healthy - AQA - GCSE Biology - Question 8 - 2018 - Paper 1
Question 8
Food security is when a population has enough food to stay healthy.
Lack of food security is a global problem.
One way to maintain food security is to increase the e... show full transcript
Worked Solution & Example Answer:Food security is when a population has enough food to stay healthy - AQA - GCSE Biology - Question 8 - 2018 - Paper 1
Step 1
Suggest two other possible disadvantages of intensive farming methods.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Diseases can spread more rapidly due to the close confinement of animals.
The overuse of antibiotics may lead to the buildup of these drugs in the food chain.
Step 2
Explain how the intensive farming of pigs increases the efficiency of food production.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Intensive farming methods often keep pigs in controlled environments where they are:
Kept inside or in a temperature-controlled environment,
Kept enclosed or in a restricted environment.
These conditions help reduce the energy lost in maintaining body temperature and minimize the energy required for movement, allowing more energy to be directed towards growth.
Step 3
Calculate the percentage (%) decrease in the number of seals caught from 2004 to 2010.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The number of seals caught in 2004 was 362, and in 2010 it was 67.
To find the percentage decrease:
Percentage decrease = ( \frac{362 - 67}{362} \times 100 = \frac{295}{362} \times 100 \approx 81.49% )
Step 4
Suggest two reasons why the conclusion in the newspaper might not be correct.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Aboriginal people can eat other foods, so they may not be entirely reliant on seal for their diet.
There may be alternative food sources available that are not being considered.
