Graphs and Trends
What letter shape does exponential population growth resemble?
J
Humans are an example of which type of selected species: K-selected or R-selected?
K
Is a flood a density-dependent or density-independent factor?
density-independent
What does the GDP stand for
Gross Domestic Product
= $$
What does total fertility rate estimate?
The average number of children born per woman over her reproductive lifetime
What letter shape does logistic population growth resemble?
S
Which type of species typically produces many offspring with little parental care?
r-selected
Is competition for food density-dependent or density-independent?
Density-dependent
What field studies human populations, including births and deaths?
Demography
Name one development that helped increase the human population.
Medicine, improved healthcare, increased food production, sanitation
What is the name for the maximum population an environment can support?
Carrying capacity
Which type of species usually produces fewer offspring and provides more parental care?
K-selected
What is one example of a density-independent factor?
Natural disaster (A hurricane, drought, flood, or wildfire)
What helped humans produce more food and increase population size?
the invention of agriculture
In stage 1, the birth and death rates are both _____ and ______ so theres _________ population growth
Both high, about equal, little
What happens to population growth as a population approaches carrying capacity?
It slows
Which type of species generally has a higher level of parental investment per offspring?
K-selected
What type of factor becomes more impactful as population density increases, such as the spread of disease?
Density-dependent
Globally, has life expectancy generally increased or decreased over time?
increased
A population grows beyond the resources available to support it. What might happen to its size?
Decrease (dieback)
A population grows rapidly with unlimited resources. Which type of growth is occurring?
Exponential
A species produces hundreds of offspring, matures quickly, and provides little parental care. Is it more likely R-selected or K-selected?
r-selected
A drought reduces available water regardless of how crowded a population is. What type of limiting factor is it?
Density-independent
Globally, have total fertility rates generally increased or decreased over time?
Decreased
What likely causes population dieback?
The population may have exceeded available resources or carrying capacity, leading to increased deaths or reduced reproduction.