UNIT 3 POPULATIONS APES EXAM REVIEW QUESTIONS AND ANSWERS 2025
the five indirect drivers of change - (ANSWER)Demographic, Economic, Sociopolitical, Science and Tech,
Cultural and Religious
seven direct drivers of change - (ANSWER)Changes in local land use and cover
Species introduction and removal
Technology adaptation and use
External inputs
Harvest and resource consumption
Climate change
Natural physical and biological drivers
Birth Rate - (ANSWER)individuals born per 1,000 individuals/year
Death Rate - (ANSWER)individuals who die per 1,000 individuals/year
Growth rate - (ANSWER)(birthrate + immigration) - (death rate + emigration) expressed as a percentage
of the total pop.
Sex ratio - (ANSWER)relative number of males and females in a population
Sex ratio importance - (ANSWER)# of females determines birth rate
Age distribution - (ANSWER)number of individuals of each age in the population
Demographic transition - (ANSWER)
four categories of limiting factors - (ANSWER)Raw material availability
Energy availability
, UNIT 3 POPULATIONS APES EXAM REVIEW QUESTIONS AND ANSWERS 2025
Accumulation of waste products
Interactions among organisms
difference between intrinsic and extrinsic limiting factors - (ANSWER)Intrinsic = inside population
Extrinsic = outside population
Intrinsic Limiting Factor Example - (ANSWER)Low Birth rates
Emigration triggered by population density
Extrinsic Limiting Factor Example - (ANSWER)Predation
Loss of food source
difference between density-dependent and density-independent limiting factors - (ANSWER)density-
dependent = triggered by population size
density-independent = happen to all sizes
Density-Dependent Example - (ANSWER)Disease
food shortages
Density-Independent Example - (ANSWER)natural disasters
human activities
Puget sound limiting factors for salmon - (ANSWER)1. Decreasing O2 supply
2. Low food supply
3. Disease
4. Predators
5. Limited space
the five indirect drivers of change - (ANSWER)Demographic, Economic, Sociopolitical, Science and Tech,
Cultural and Religious
seven direct drivers of change - (ANSWER)Changes in local land use and cover
Species introduction and removal
Technology adaptation and use
External inputs
Harvest and resource consumption
Climate change
Natural physical and biological drivers
Birth Rate - (ANSWER)individuals born per 1,000 individuals/year
Death Rate - (ANSWER)individuals who die per 1,000 individuals/year
Growth rate - (ANSWER)(birthrate + immigration) - (death rate + emigration) expressed as a percentage
of the total pop.
Sex ratio - (ANSWER)relative number of males and females in a population
Sex ratio importance - (ANSWER)# of females determines birth rate
Age distribution - (ANSWER)number of individuals of each age in the population
Demographic transition - (ANSWER)
four categories of limiting factors - (ANSWER)Raw material availability
Energy availability
, UNIT 3 POPULATIONS APES EXAM REVIEW QUESTIONS AND ANSWERS 2025
Accumulation of waste products
Interactions among organisms
difference between intrinsic and extrinsic limiting factors - (ANSWER)Intrinsic = inside population
Extrinsic = outside population
Intrinsic Limiting Factor Example - (ANSWER)Low Birth rates
Emigration triggered by population density
Extrinsic Limiting Factor Example - (ANSWER)Predation
Loss of food source
difference between density-dependent and density-independent limiting factors - (ANSWER)density-
dependent = triggered by population size
density-independent = happen to all sizes
Density-Dependent Example - (ANSWER)Disease
food shortages
Density-Independent Example - (ANSWER)natural disasters
human activities
Puget sound limiting factors for salmon - (ANSWER)1. Decreasing O2 supply
2. Low food supply
3. Disease
4. Predators
5. Limited space
