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CHECK FOR UNDERSTANDING
When the birthrate of a population exceeds its death rate, the population decreases. increases. stays the same. increases then decreases.
CHECK FOR UNDERSTANDING
An S-shaped curve on a graph of population growth is characteristic of exponential growth. logistic growth. carrying capacity. delayed growth.
CHECK FOR UNDERSTANDING
Exponential growth in a population slows down or stops as resources become limited. rate of immigration increases. rate of emigration decreases. birth rate increases.
POPULATION FLUCTUATION NOTES
1. Limits to Population Growth: A. A limiting factor is a factor that
causes population growth to decrease.
POPULATION FLUCTUATION NOTES
1. Limits to Population Growth: A limiting factor is a factor that causes population growth to decrease.
a. Density Dependent Factors are limiting factors that depend upon the population size.
Examples include: Competition Predation Parasitism Disease
POPULATION FLUCTUATION NOTES
b. Density Independent Factors are limiting factors that do not depend upon a population’s size.
Examples include: Natural Disasters Seasonal Variation Human activities such as deforestation
CHECK FOR UNDERSTANDING
A limiting factor that affects all populations in similar ways regardless of their size might be drought. disease. predation. crowding.
CHECK FOR UNDERSTANDING
Within a limited area, if the population of a predator increases, the population of its prey is likely to increase. decrease. remain about the same. become extinct.