Natural Selection Framework
Survival of the fittest
The Natural Selection Framework explains how species adapt and evolve over time through the process of natural selection. It describes how variations in traits can lead to differential reproductive success, resulting in the evolution of new species. The framework consists of three essential ingredients: variation, inheritance, and differential reproductive success.
- Variation is essential for evolution to occur
- Inheritance of traits is necessary for evolution to occur
- Differential reproductive success is the driving force behind evolution
- Identify variation in traitsRecognize the differences in traits among individuals within a speciesPro tipConsider the role of genetic mutations and environmental factors in generating variationWarningBe aware that not all variations are heritable
- Determine inheritance of traitsEstablish whether the variations in traits are inherited from parents to offspringPro tipConsider the role of genetics in passing on traitsWarningBe aware that not all inherited traits are adaptive
- Assess differential reproductive successEvaluate how the variations in traits affect an individual's ability to survive and reproducePro tipConsider the role of environmental pressures in shaping reproductive successWarningBe aware that reproductive success is not the only factor influencing evolution
The giraffe's long neck is an example of how natural selection can lead to the evolution of a trait that provides a survival advantage
The Natural Selection Framework was first proposed by Charles Darwin in his book 'On the Origin of Species'. Darwin's theory revolutionized the field of biology and provided a fundamental explanation for the diversity of life on Earth.