Biology A 5.2 + 5.3

Front

What is a density-independent limiting factor?

Back

A limiting factor that affects all populations in similar ways, regardless of population density. Examples include natural disasters and climate change.

Front

What is demography?

Back

The scientific study of human populations, including their size, distribution, and trends.

Front

What is a density-dependent limiting factor?

Back

A limiting factor that depends on population density. Examples include competition for resources, predation, and disease.

Front

What typically occurs during the first stage of demographic transition?

Back

High birth and death rates.

Front

Give an example of a density-independent limiting factor.

Back

Natural disasters such as earthquakes or floods.

Front

What is the difference between density-dependent and density-independent limiting factors?

Back

Density-dependent factors vary with population density, while density-independent factors affect populations regardless of density.

Front

What is the demographic transition model?

Back

A model that describes the transition of a country from high birth and death rates to low birth and death rates as it develops.

Front

What are the stages of demographic transition?

Back

1. Pre-transition: high birth and death rates. 2. Transition: declining death rates, high birth rates. 3. Post-transition: low birth and death rates.

Front

What is competition for food an example of?

Back

A density-dependent limiting factor.

Front

What is the impact of climate change on populations?

Back

It acts as a density-independent limiting factor affecting all populations similarly.