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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.
Previously we defined biological evolution as change in the heritable characteristics of a population over succeeding generations. In more technical terms, biological evolution is defined as change in the gene pool of a population, measurable as changes in allele frequencies in a population over time.
The meaning of EVOLUTION is descent with modification from preexisting species : cumulative inherited change in a population of organisms through time leading to the appearance of new forms : the process by which new species or populations of living things develop from preexisting forms through successive generations; also : the scientific ...
Evolution reflects the adaptations of organisms to their changing environments and can result in altered genes, novel traits, and new species.
An introduction to evolution, explaining what it is and how it works, including mechanisms like selection, mutation, migration, and speciation.
The crucial break from the concept of constant typological classes or types in biology came with the theory of evolution through natural selection, which was formulated by Charles Darwin and Alfred Wallace in terms of variable populations.
Evolution itself is a biological phenomenon common to all living things, even though it has led to their differences. 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 ...
Evolution is a process that results in changes in the genetic content of a population over time. There are two general classes of evolutionary change: microevolution and...
Evolution, the unifying theory of biology, describes a mechanism for the change and diversification of species over time. Learning Objectives Describe the historical influences on Darwin’s theory of evolution
Evolution 101. An introduction to evolution: what is evolution and how does it work? The history of life: looking at the patterns – Change over time and shared ancestors; Mechanisms: the processes of evolution – Selection, mutation, migration, and more; Microevolution – Evolution within a population; Speciation – How new species arise