Definition
Natural selection, as proposed by Darwin, is the process by which individuals with advantageous traits are more likely to survive and reproduce in a given environment, leading to the gradual adaptation of populations over generations. This mechanism drives evolution by favoring the propagation of beneficial genetic variations while diminishing the prevalence of less advantageous traits.
Summary
Natural selection is a fundamental concept in biology that explains how species evolve over time. It operates on the principle that individuals with traits better suited to their environment are more likely to survive and reproduce. This process leads to the gradual adaptation of species, as advantageous traits become more common in the population. Understanding natural selection helps us comprehend the diversity of life and the mechanisms behind evolutionary change. The theory of natural selection was popularized by Charles Darwin, who provided extensive evidence through observations and studies. It emphasizes the importance of genetic variation and environmental factors in shaping the traits of organisms. By studying natural selection, we can gain insights into the dynamics of ecosystems, the development of new species, and the ongoing changes in the natural world.
Key Takeaways
Survival of the Fittest
This phrase means that the organisms best suited to their environment are more likely to survive and reproduce.
highAdaptation is Key
Adaptations are traits that improve an organism's chances of survival and reproduction in a specific environment.
highGenetic Variation Drives Evolution
Without genetic variation, natural selection cannot occur, as there would be no differences for selection to act upon.
mediumNatural Selection is Ongoing
Natural selection is a continuous process that shapes species over time, responding to environmental changes.
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