AP®︎ Biology: Topic 8.3 Flashcards

Master key terms and definitions for Topic 8.3 of AP Biology – Population Ecology to help you prep for quizzes and the AP exam.

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Term

Population

Definition

A group of individuals of the same species living in the same area.

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Population
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A group of individuals of the same species living in the same area.

8.3.A8.3.A.1
Population Growth Equation
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Change in population size over time equals births minus deaths: dN/dt = B - D.

8.3.A8.3.A.2
Exponential Growth
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Rapid increase at a constant per capita rate under ideal, unlimited conditions, producing a J-shaped curve.

8.3.A8.3.A.2
Exponential Growth Equation
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Population change equals maximum per capita growth rate times population size: dN/dt = rmaxN.

8.3.A8.3.A.2
Maximum Per Capita Growth Rate (rmax)
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The highest possible per individual growth rate under ideal environmental conditions.

8.3.A8.3.A.2
Limiting Factors
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Environmental conditions that restrict population growth by reducing survival or reproduction.

8.3.A
Biotic and Abiotic Factors
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Biotic factors are living influences; abiotic factors are nonliving physical and chemical influences.

8.3.A8.3.A.1
Resource Availability
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The supply of food, water, oxygen, shelter, and other necessities in an environment.

8.3.A
Habitat
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The environment where organisms live, obtain resources, and reproduce.

8.3.A8.3.A.1
Competition
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The struggle among organisms for limited resources needed for survival and reproduction.

8.3.A8.3.A.1
Predation
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An interaction in which one organism kills and eats another.

8.3.A8.3.A.1
Disease
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The spread of pathogens within a population that lowers survival or reproduction.

8.3.A
Climate
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Long-term patterns of temperature, precipitation, and weather that affect habitats and resources.

8.3.A
Adaptations for Obtaining Energy and Matter
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Inherited traits that help organisms acquire and use resources in a specific environment.

8.3.A8.3.A.2
J-Shaped Growth Curve
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A graph pattern showing rapid exponential increase when resources are unlimited.

8.3.A8.3.A.2