Evolution | Definition, History, Types, & Examples | Britannica
2024年10月25日 · Evolution, theory in biology postulating that the various types of living things on Earth have their origin in other preexisting types and that the distinguishable differences are due to modifications in successive generations.
Biology - Evolution, Genetics, Species | Britannica
2024年11月24日 · Evidence to support the theory of evolution has come primarily from the fossil record, from comparative studies of structure and function, from studies of embryological development, and from studies of DNA and RNA (ribonucleic acid).
Evolution - Natural Selection, Adaptation, Genetics | Britannica
2024年10月25日 · Biological evolution is the process of change and diversification of living things over time, and it affects all aspects of their lives—morphology (form and structure), physiology, behaviour, and ecology. Underlying these changes are changes in the hereditary materials.
Biology - Evolution, Natural Selection, Adaptation | Britannica
2024年11月24日 · Biology - Evolution, Natural Selection, Adaptation: As knowledge of plant and animal forms accumulated during the 16th, 17th, and 18th centuries, a few biologists began to speculate about the ancestry of those organisms, though the prevailing view was that promulgated by Linnaeus—namely, the immutability of the species.
evolution: Facts & Related Content - Encyclopedia Britannica
Evolution, theory in biology postulating that the various types of living things on Earth have their origin in other preexisting types and that the distinguishable differences are due to modifications in successive generations.
Biology - Evolution, Genetics, Classification | Britannica
2024年11月24日 · Much of the earliest recorded history of biology is derived from Assyrian and Babylonian bas-reliefs showing cultivated plants and from carvings depicting veterinary medicine. Illustrations on certain seals reveal that the Babylonians had learned that the date palm reproduces sexually and that pollen could be taken from the male plant and used ...
evolution summary - Encyclopedia Britannica
evolution, Biological theory that animals and plants have their origin in other preexisting types and that the distinguishable differences are due to modifications in successive generations. It is one of the keystones of modern biological theory. In 1858 Charles Darwin and Alfred Russel Wallace jointly published
Evolution - Darwin, Natural Selection, Genetics | Britannica
2024年10月25日 · Evolution - Darwin, Natural Selection, Genetics: All human cultures have developed their own explanations for the origin of the world and of human beings and other creatures. Traditional Judaism and Christianity explain the origin of living beings and their adaptations to their environments—wings, gills, hands, flowers—as the handiwork of ...
Genetic variation and rate of evolution - Encyclopedia Britannica
2024年10月25日 · Evolution - Genetic Variation, Rate, Adaptation: The more genetic variation that exists in a population, the greater the opportunity for evolution to occur. As the number of gene loci that are variable increases and as the number of alleles at each locus becomes greater, the likelihood grows that some alleles will change in frequency at the ...
Evolution - Theory, Cultural Impact, Science | Britannica
2024年10月25日 · The theory of evolution makes statements about three different, though related, issues: (1) the fact of evolution—that is, that organisms are related by common descent; (2) evolutionary history—the details of when lineages split from one another and of the changes that occurred in each lineage; and (3) the mechanisms or processes by which ...