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Figure 12 shows the human population from 1600 to 2010 - AQA - GCSE Biology - Question 9 - 2020 - Paper 1

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Figure 12 shows the human population from 1600 to 2010. In 1900 the human population was 1.6 billion. Calculate how many times greater the human population was in ... show full transcript

Worked Solution & Example Answer:Figure 12 shows the human population from 1600 to 2010 - AQA - GCSE Biology - Question 9 - 2020 - Paper 1

Step 1

Calculate how many times greater the human population was in the year 2000 compared with the year 1900.

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Answer

In 1900, the human population was 1.6 billion. By 2000, the population had increased to approximately 6.1 billion. To find how many times greater this is, we use the formula:

extNumberoftimesgreater=Population in 2000Population in 1900=6.11.63.81 ext{Number of times greater} = \frac{\text{Population in 2000}}{\text{Population in 1900}} = \frac{6.1}{1.6} \approx 3.81

Thus, the population in 2000 was approximately 3.81 times greater than in 1900.

Step 2

Describe: why more land is being used for farming

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Answer

More land is being used for farming primarily due to increased food demands from a growing population. As the global population rises, the need for sufficient food supply becomes critical. This has led to the expansion of agricultural areas, often into previously undeveloped or natural landscapes, to ensure that food production can meet consumption needs.

Step 3

Describe: how increased farming has decreased biodiversity.

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Answer

Increased farming practices can lead to decreased biodiversity through habitat destruction. As land is converted for agriculture, various ecosystems are disrupted, leading to a loss of native plant and animal species. Additionally, monoculture farming, which focuses on growing a single crop over large expanses, reduces the variety of life in that area, making it vulnerable to pests and diseases, further threatening local biodiversity.

Step 4

What is the advantage of golden rice compared with non-GM rice?

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Answer

Golden rice has improved nutritional value, specifically enriched with Vitamin A, which can help combat deficiencies in populations that rely predominantly on rice as their staple food.

Step 5

Suggest one reason why some people are concerned about the use of golden rice.

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Answer

Some people are concerned about the use of golden rice due to potential environmental impacts of genetically modified organisms (GMOs) on local ecosystems and biodiversity. There are also concerns regarding health effects and the long-term consequences of consuming genetically modified foods.

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