Population Growth

What does the carrying capacity represent in a logistic growth model?

• The maximum population size that an environment can sustain indefinitely

• The rate at which a population grows in an unlimited environment

• The initial population size at the start of observation

• The time it takes for a population to double in size

What is represented by the horizontal dotted line at the top of the graph?

• A density-dependent factor
• J curve
• The maximum number of individuals the environment can support
• S curve

What factor combination is most likely to decrease a population's growth rate?

• high life expectancy and high infant mortality

• low life expectancy and low infant mortality

• high life expectancy and low infant mortality

• low life expectancy and high infant mortality

What term is used to describe the environmental factors that prevent populations from increasing indefinitely?

• ecosystem resilience

• limiting factors

• reproductive rate

• habitat fragmentation

Does a population decline when the death rate exceeds the birth rate?

• True

• False

Which factors contribute to the growth of a population?

• immigration

• births

• natural disasters

• deaths

Which factors contribute to reducing the number of individuals in a population?

• increased birthrate

• higher death rate

• more immigration

• greater emigration

Immigration is

• the number of individuals moving in to an area
• the number of individuals moving out of an area

An example of emigration is

• the number of individuals moving into New York City

• the number of individuals moving out of New York City

Which factor is most likely to lead to an increase in an ecosystem's carrying capacity?

• reduction in food sources

• increase in natural disasters

• improvement in habitat quality

• growth in predator populations