AP®︎ Biology: Topic 8.4 Flashcards

Master key terms and definitions for Topic 8.4 of AP Biology – Effect of Density on Populations to help you prep for quizzes and the AP exam.

0%
9 cards total
9 not started
0 learning
0 almost done
0 mastered
Term

Population Density

Definition

The number of individuals of a species per unit area or volume.

1 / 9
Population Density
Not Started

The number of individuals of a species per unit area or volume.

8.4.A
Overpopulation and Resource Limitation
Not Started

A condition where population size exceeds available resources, increasing competition, mortality, and stress.

8.4.A
Carrying Capacity
Not Started

The maximum population size an environment can sustainably support with available resources.

8.4.A8.4.A.1
Logistic Growth
Not Started

Population growth that slows as resources become limited and levels off near carrying capacity.

8.4.A8.4.A.2
Logistic Growth Equation
Not Started

dN/dt = rmaxN(1 - N/K), relating growth rate to population size and carrying capacity.

8.4.A8.4.A.2
Variables in the Logistic Growth Equation
Not Started

dN/dt: population change over time; rmax: maximum per capita growth rate; N: population size; K: carrying capacity.

8.4.A8.4.A.2
Exponential Growth vs. Logistic Growth
Not Started

Exponential growth assumes unlimited resources; logistic growth slows and stabilizes as resources become limited.

8.4.A8.4.A.2
Density-Dependent vs. Density-Independent Factors
Not Started

Limiting factors either intensify with population density or affect populations regardless of density.

8.4.A8.4.A.2
Examples of Density-Dependent and Density-Independent Factors
Not Started

Competition and disease depend on crowding, while weather and disasters affect populations regardless of density.

8.4.A8.4.A.2