Unit 2 Human Population Review

Front

What is the definition of a population pyramid?

Back

A graphical representation that shows the distribution of various age groups in a population, typically divided by gender.

Front

What does a stable population pyramid look like?

Back

A stable population pyramid has a uniform shape, indicating that birth and death rates are balanced.

Front

What are density dependent limiting factors?

Back

Factors that affect population size in relation to the population density, such as food availability, disease, and predation.

Front

What is extinction?

Back

The permanent loss of a species when the last individual of that species dies.

Front

What is the significance of Jean Baptiste von Helmont's willow tree experiment?

Back

It demonstrated that plants gain most of their mass from water and carbon dioxide, not just from soil.

Front

What are two examples of density dependent limiting factors?

Back

Disease and food availability.

Front

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

Back

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

Front

What is carrying capacity?

Back

The maximum number of individuals of a species that an environment can sustainably support.

Front

What is the impact of overpopulation on the environment?

Back

Overpopulation can lead to resource depletion, habitat destruction, and increased pollution.

Front

What is the role of predators in population control?

Back

Predators help maintain the balance of ecosystems by controlling the population sizes of prey species.