evolution of types in important points ??
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Darwin's theory of evolution, also called Darwinism, can be further divided into 5 parts: "evolution as such", common descent, gradualism, population speciation, and natural selection.✅
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Evolution
scientific theory
WRITTEN BY
Francisco Jose Ayala
Francisco J. Ayala is a University Professor and Donald Bren Professor of Biological Sciences, School of Biological Sciences; Professor of Philosophy, School of Humanities; and Professor of Logic and the...
Last Updated: Nov 20, 2020 See Article History
Alternative Title: descent
Evolution, theory in biology postulating that the various types of plants, animals, and other living things on Earth have their origin in other preexisting types and that the distinguishable differences are due to modifications in successive generations. The theory of evolution is one of the fundamental keystones of modern biological theory.
Evolution
QUICK FACTS
KEY PEOPLE
Hugo de Vries
Charles Darwin
Thomas Henry Huxley
Charles Lyell
Henri Bergson
Alfred Russel Wallace
Herbert Spencer
Jean-Baptiste Lamarck
Erasmus Darwin
Konrad Lorenz
RELATED TOPICS
Heredity
Life
Biology
Human evolution
Biosphere
Morphology
Lamarckism
Evolutionary psychology
Cultural evolution
De-extinction
DID YOU KNOW?
Scientists speculate that hiccuping is a vestigial reflex inherited from an aquatic ancestor.
A panda's "thumb" is a wrist bone that elongated with evolution.
Human brain size expanded with evolution and ultimately tripled.
According to 2017 Gallup polls, more Americans believe in global warming than in evolution.
The diversity of the living world is staggering. More than 2 million existing species of organisms have been named and described; many more remain to be discovered—from 10 million to 30 million, according to some estimates. What is impressive is not just the numbers but also the incredible heterogeneity in size, shape, and way of life—from lowly bacteria, measuring less than a thousandth of a millimetre in diameter, to stately sequoias, rising 100 metres (300 feet) above the ground and weighing several thousand tons; from bacteria living in hot springs at temperatures near the boiling point of water to fungi and algae thriving on the ice masses of Antarctica and in saline pools at −23 °C (−9 °F); and from giant tube worms discovered living near hydrothermal vents on the dark ocean floor to spiders and larkspur plants existing on the slopes of Mount Everest more than 6,000 metres (19,700 feet) above sea level.
major evolutionary events