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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
Some people think the farming methods shown in Figure 10 are unethical. Suggest two other possible disadvantages of intensive farming methods.
Answer
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Diseases may spread more rapidly due to high population density.
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The overuse of antibiotics can build up in the food chain, potentially affecting human health.
Step 2
Explain how the intensive farming of pigs increases the efficiency of food production.
Answer
Intensive farming increases efficiency through several methods:
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Pigs are kept in a controlled environment which minimizes energy loss due to temperature regulation.
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By keeping pigs in restricted spaces, less energy is used for movement, allowing more energy to be converted into growth, thereby increasing the overall output of food.
Step 3
Calculate the percentage (%) decrease in the number of seals caught from 2004 to 2010.
Answer
To find the percentage decrease, we first determine the decrease in numbers:
Decrease = 362 (in 2004) - 67 (in 2010) = 295
Next, we calculate the percentage decrease using the formula:
ext{Percentage decrease} = rac{ ext{Decrease}}{ ext{Original number}} imes 100 = rac{295}{362} imes 100 ext{ (approximately 81.49 ext{%})}
Step 4
The conclusion in the newspaper might not be correct. Suggest two reasons why.
Answer
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Aboriginal people can eat other foods besides seal, which may provide them with sufficient nutrition.
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The report does not consider how traditional food sources have evolved or changed over time, indicating that there might be other available food options.