Evolution by Natural Selection Framework
Survival & Reproduction
Evolution by natural selection is the process by which populations of living organisms adapt and evolve over time. It is driven by the interactions between organisms and their environment, and is shaped by the principles of variation, heritability, and differential reproduction. This framework provides a fundamental explanation for the diversity of life on Earth, and is supported by a vast amount of scientific evidence.
- Variation in populations is the raw material for evolution
- Heritability is the passing of traits from parents to offspring
- Differential reproduction is the driving force behind evolution
- Identify the ProblemDetermine the adaptive problem that an organism is trying to solvePro tipConsider the environment and selection pressures that the organism is facingWarningBe careful not to assume that a trait is an adaptation without evidence
- Analyze the TraitExamine the characteristics of the trait and its potential functionsPro tipLook for evidence of special design and efficiencyWarningBe aware of the potential for multiple functions or exaptations
- Test the HypothesisDesign and conduct experiments to test the hypothesis that the trait is an adaptationPro tipUse a combination of observational and experimental methodsWarningBe careful to control for confounding variables and alternative explanations
The human eye is a complex organ that has evolved over millions of years. It is composed of multiple parts, each with a specific function, and is capable of detecting a wide range of light intensities and wavelengths.
The concept of evolution by natural selection was first proposed by Charles Darwin in the 19th century, and has since been extensively tested and validated through numerous scientific studies and observations.