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natural selection, process that results in the adaptation of an organism to its environment by means of selectively reproducing changes in its genotype, or genetic constitution. A brief treatment of natural selection follows. For full treatment, see evolution: The concept of natural selection.
Natural selection is a pressure that causes groups of organisms to change over time. Animals inherit their genetics from their parents or ancestors, and the environment is constantly changing. So, no organism is perfectly adapted to its environment.
Natural selection is one of the basic mechanisms of evolution, along with mutation, migration, and genetic drift. Darwin’s grand idea of evolution by natural selection is relatively simple but often misunderstood. To see how it works, imagine a population of beetles: There is variation in traits.
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.
Natural selection is the process through which species adapt to their environments. It is the engine that drives evolution.
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 ...
Natural selection is a process by which a species changes over time in response to changes in the environment, or competition between organisms, in order for the species to survive.
Learn about Darwin's theory of evolution and natural selection on Khan Academy.
What is natural selection in biology? Natural selection is defined as a process in nature through which living organisms adapt and change in response to an environmental condition. And organisms that are better suited to their environment tend to survive longer and produce more offspring.
Natural selection, also known as “survival of the fittest,” is the more prolific reproduction of individuals with favorable traits that survive environmental change because of those traits; this leads to evolutionary change.