AP Biology Flashcards: Variations in Populations
Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026
Review key ideas with interactive flashcards. This set includes 10 cards to help you master important concepts.
Two populations of the same species exist. Population A has low genetic variation, while Population B has high genetic variation. Which is at a greater risk of extinction?
Population A is at a greater risk of extinction because less genetically diverse populations are not as resilient to environmental changes.
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Two populations of the same species exist. Population A has low genetic variation, while Population B has high genetic variation. Which is at a greater risk of extinction?
Population A is at a greater risk of extinction because less genetically diverse populations are not as resilient to environmental changes.
What is the relationship between a population's genetic diversity and its resilience to environmental change?
Genetically diverse populations are more resilient to environmental changes.
A specific population faces a sudden, new environmental pressure. Which characteristic would best improve its ability to withstand this pressure?
High genetic diversity within the population would improve its ability to withstand the environmental pressure.
Explain the connection between genetic diversity and a population's long-term survival.
Greater genetic diversity makes a population more resilient to environmental changes, thus reducing its risk of extinction.
Why are genetically diverse populations considered more robust?
They are considered more robust because their genetic variation makes them more resilient to environmental changes.
What is the primary consequence of low genetic diversity for a population?
A population with low genetic diversity is less resilient to environmental changes and is at a higher risk of extinction.
Genetic Diversity
The level of genetic variation within a species or population, which affects its ability to withstand environmental pressures.
What key factor influences the dynamics of a population?
The level of genetic variation in a population influences its dynamics.
If a forest ecosystem experiences a prolonged drought, which type of plant population is most likely to survive and adapt?
A genetically diverse plant population is most likely to survive and adapt because it is more resilient to environmental pressures like drought.
How does the level of genetic variation in a population affect its risk of extinction?
Populations with high genetic variation are less at risk of extinction.