A student researching evolution has taken notes:
• Natural selection favors traits that enhance survival and reproduction • Genetic mutations introduce variation into populations • Evolution occurs across generations, not within individual lifetimes • Evidence includes fossils, DNA comparisons, and observed adaptations • Species adapt to changing environments or face extinction
The student wants to explain how evolution produces change.
Evidence for evolution includes fossils, DNA comparisons, and observed adaptations.
Evolution produces change as genetic mutations introduce variation, and natural selection favors traits that enhance survival—accumulating changes across many generations.
Species must adapt to changing environments or face extinction.
Evolution occurs across generations, not within individual lifetimes.
Correct Answer: B
Choice B. Mutations introducing variation plus selection over generations explains mechanism.