APES Unit 3: Populations Review

Front

What does an age structure diagram showing a wide base indicate?

Back

Rapid Growth

Front

Define carrying capacity.

Back

Maximum population size of a species that the environment can sustain indefinitely.

Front

What is Type I survivorship?

Back

A pattern of survival where there is high survival throughout most of the life span, but individuals start to die in large numbers as they approach old age.

Front

What type of growth curve is characterized by rapid increase and no limits?

Back

Exponential growth curve.

Front

What is Type II survivorship?

Back

A pattern of survival with a relatively constant decline in survivorship throughout most of the life span.

Front

What does a logistic growth curve represent?

Back

Population growth that is initially exponential but slows as the population reaches carrying capacity.

Front

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

Back

Density-dependent factors are influenced by population size (e.g., competition, predation), while density-independent factors affect populations regardless of size (e.g., natural disasters).

Front

What is the significance of the demographic transition model?

Back

It describes the transition from high birth and death rates to low birth and death rates as a country develops.

Front

What is the formula for calculating population growth rate?

Back

(Birth rate - Death rate) + (Immigration rate - Emigration rate).

Front

What is Type III survivorship?

Back

A pattern of survival where there is low survival early in life, with few individuals reaching adulthood.