Which of the following describes the pattern of human population growth over the past 200 years?
a. k-curve
b. r-curve
c. S-curve
d. J-curve
e. Linear increase
The correct answer is d. J-curve.
The correct answer is d. J-curve.
To determine the pattern of human population growth over the past 200 years, we can analyze the available options:
a. k-curve: The k-curve refers to a population growth pattern commonly observed in other species where the population reaches a growth limit imposed by the carrying capacity of the environment. This curve is unlikely to describe human population growth over the past 200 years as human populations have not yet reached the carrying capacity of the planet.
b. r-curve: The r-curve, also known as an exponential growth curve, represents rapid and unrestricted population growth. While there was indeed a significant increase in the global population over the past 200 years, it is not accurate to describe it entirely as unrestricted or exponential.
c. S-curve: The S-curve is a sigmoidal growth curve that starts with slow growth, then experiences rapid growth, and finally levels off with a more stable population size. This pattern is commonly observed in human population growth, especially when considering the advancements in healthcare, sanitation, and technology during the past 200 years.
d. J-curve: The J-curve represents exponential growth without any constraints. This pattern is also unsuitable for describing human population growth over the past 200 years because there have been factors such as resource limitations and social changes impacting population growth.
e. Linear increase: A linear increase refers to a constant growth rate over time. Human population growth over the past 200 years has not followed a linear trend due to various factors influencing population growth.
Considering the options provided, the most appropriate choice to describe the pattern of human population growth over the past 200 years is c. S-curve.