Photo AI
Figure 12 shows the human population from 1600 to 2010 - AQA - GCSE Biology - Question 9 - 2020 - Paper 1
Question 9
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.
Answer
To solve this, we first need to determine the human population in the year 2000. Based on the graph, the population around 2000 is approximately 6 billion. Since the population in 1900 was 1.6 billion, we calculate how many times greater this is by using the formula:
ext{Number of times greater} = rac{ ext{Population in 2000}}{ ext{Population in 1900}} = rac{6 ext{ billion}}{1.6 ext{ billion}} = 3.75
Thus, the human population in the year 2000 was approximately 3.75 times greater than in 1900.
Step 2
Describe: why more land is being used for farming.
Answer
More land is being used for farming due to several factors. One primary reason is population growth, which has increased the demand for food production. As urban areas expand, agricultural land is also needed to meet the food needs of larger populations. Additionally, advancements in agricultural techniques and technology have made it possible to cultivate previously unusable land, including marginal lands.
Step 3
Describe: how increased farming has decreased biodiversity.
Answer
Increased farming has significantly decreased biodiversity due to monoculture practices, where single crops are grown over large areas. This reduces the variety of plants and animals in these ecosystems. Furthermore, the use of pesticides and fertilizers can harm non-target species, leading to a decline in populations of insects, birds, and other wildlife. Habitat destruction for agricultural expansion also contributes to the loss of biodiversity.
Step 4
What is the advantage of golden rice compared with non-GM rice?
Answer
The advantage of golden rice compared with non-GM rice is that it has improved nutritional value, particularly in terms of its vitamin A content, which is vital for preventing deficiencies that can lead to blindness and other health issues.
Step 5
Suggest one reason why some people are concerned about the use of golden rice.
Answer
Some people are concerned about the use of golden rice due to potential health risks associated with genetically modified organisms (GMOs). There are fears that GMOs may lead to unforeseen health effects, environmental impacts, and the loss of biodiversity.