Who is Charles Lyell and what did he do?
Charles Lyell, in full Sir Charles Lyell, Baronet, (born November 14, 1797, Kinnordy, Forfarshire, Scotland—died February 22, 1875, London), Scottish geologist largely responsible for the general acceptance of the view that all features of the Earth’s surface are produced by physical, chemical, and biological processes …
How does natural selection depend on variation?
The mechanism that Darwin proposed for evolution is natural selection. Natural selection causes populations to become adapted, or increasingly well-suited, to their environments over time. Natural selection depends on the environment and requires existing heritable variation in a group.
Which of the following is an example of adaptive radiation?
In fact, many classic examples of adaptive radiations involve islands or lakes; notable examples include Darwin’s finches of the Galapagos, honeycreeper birds and silversword plants of Hawaii, and cichlid fish of lakes Malawi and Victoria in Africa.
What is called adaptive radiation?
Adaptive radiation, evolution of an animal or plant group into a wide variety of types adapted to specialized modes of life. Adaptive radiations are best exemplified in closely related groups that have evolved in a relatively short time.
Are Darwin’s finches an example of adaptive radiation?
Darwin’s finches are a classic example of adaptive radiation. The ecological diversity of the Galápagos in part explains that radiation, but the fact that other founder species did not radiate suggests that other factors are also important.
What is the result of adaptive radiation?
In evolutionary biology, adaptive radiation is a process in which organisms diversify rapidly from an ancestral species into a multitude of new forms, particularly when a change in the environment makes new resources available, alters biotic interactions or opens new environmental niches.
What is the main driver of adaptive radiation?
Adaptive radiation is thought to be driven mainly by divergent selection caused by competition among closely related – and therefore, ecologically similar – species (Simpson, 1953; Givnish, 1997; Schluter, 2000).
Who proposed the law of adaptive radiation?
425. THE LAW OF ADAPTIVE RADIATION. HENRY FAIRFIELD ()SBORN.
Why is adaptive radiation important?
Because adaptive radiations produce diversification through ecological specialization, they are essential for understanding how ecological forces can drive evolutionary diversification and shape the way species interact with their environments.