Question

1. explain the factors that have contributed to an increase in the survival rate of the human population. how have these factors contributed to the homeostasis of the population within its environment? explain. page 40
2. canada has birthrate 10.2 (per 1000), death rate 7.7 (per 1000), and migration rate 5.6 (per 1000). calculate the pgr for canada.
3. summarize the possible consequences of rapid human population growth. page 42

Explanation:

1. Calculate the PGR for Canada

Step1: Identify the formula

The formula for Population Growth Rate (PGR) is \(PGR=\text{Birth rate}-\text{Death rate}+\text{Migration rate}\) (per 1000).

Step2: Substitute the values

Given birth - rate = 10.2 per 1000, death - rate = 7.7 per 1000, and migration rate = 5.6 per 1000.
\[PGR=(10.2 - 7.7+5.6)\text{ per }1000\]
\[PGR=(2.5 + 5.6)\text{ per }1000\]
\[PGR = 8.1\text{ per }1000\]

Step3: Convert to percentage

To convert from per 1000 to percentage, we divide by 10.
\[PGR=\frac{8.1}{10}\%=0.81\%\]

Factors such as improved medical care (vaccinations, antibiotics, better surgical techniques) have reduced mortality from diseases. Advances in nutrition have made people healthier and more resistant to illness. Sanitation improvements (clean water, proper waste - disposal) have decreased the spread of water - borne and vector - borne diseases. These factors have increased the survival rate. In terms of homeostasis, a higher survival rate means a more stable population size. With better health, individuals are more productive, which can lead to sustainable use of resources in the environment, thus maintaining a balance between the population and its environment.

Rapid human population growth can lead to over - exploitation of natural resources like water, land, and minerals. It can cause environmental degradation such as deforestation, soil erosion, and loss of biodiversity. There may be increased competition for resources, leading to social and economic problems like poverty, hunger, and inadequate housing. It can also put pressure on infrastructure such as healthcare, education, and transportation systems.

Answer:

The Population Growth Rate (PGR) for Canada is \(0.81\%\)

2. Explain the factors that have contributed to an increase in the survival rate of the human population. How have these factors contributed to the homeostasis of the population within its environment?