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26 Οκτ 2024 · Natural selection is a fundamental biological process through which organisms adapt to their environment, resulting in evolutionary changes over generations. First described by Charles Darwin and Alfred Russel Wallace in the 19th century, natural selection explains how organisms with traits better suited to their environment are more likely to ...
16 Σεπ 2024 · Natural Selection & Populations. Every individual within a species population has the potential to reproduce and have offspring which contribute to population growth. If the offspring for every individual survived to adulthood and reproduced then the population would experience exponential growth.
26 Οκτ 2024 · Artificial selection, also known as selective breeding, is a process in which humans intentionally influence the reproduction of plants or animals to enhance certain desired traits. This practice involves selecting specific individuals with favorable characteristics and breeding them to increase the likelihood that these traits will be passed ...
Natural selection is how adaptations arise in nature. The idea of natural selection was developed in the mid-1800s by two British naturalists: Charles Darwin and Alfred Russel Wallace. Darwin wrote up his ideas in a book entitled On The Origin of Species, which was published in 1859. Natural selection is a way of explaining evolutionary change.
For this analysis, population biologists have grouped species into the two large categories—K-selected and r-selected—although they are really two ends of a continuum. K -selected species are species selected by stable, predictable environments.
Negative frequency-dependent selection serves to increase the population’s genetic variability by selecting for rare phenotypes, whereas positive frequency-dependent selection usually decreases genetic variability by selecting for common phenotypes.
