1. The process by which one state changes into another. Anything which is not static evolves over time. The word evolution specifically excludes any connotation of improvement or progress, so even 'negative' changes are evolution. In biology, this definition is often observed in terms of the change of gene frequencies in natural populations. There is no controversy about this definition.
2. The theory that species give rise to other species. This process of speciation can be accomplished in a number of ways, all of which must result in two (or more) populations becoming genetically isolated. This can be accomplished physically (allopatry and peripatry) or through division of patch types or through behavioral mechanisms (sympatry). This has been observed at low taxonomic levels. For instance, wheat is a modern species resulting from 2 instances of non-disjunction and one hybridization event that all occurred within the last 5000 years. The original plant has been identified from seeds from tombs in Egypt.
The creation of new higher level taxa is often referred to as macroevolution by non-scientists, but this usage is incorrect. The only difference between the origins of higher taxa and species is time. Today's species will eventually give rise to genera as they continue to diverge from their sister-taxa and continue to speciate themselves. All higher taxa were once just a species. Macroevolution properly refers to selection that operates above the species level, such as the selective pressure across the K-T boundary on gastropods which favored genera (but not species) with wide geographic ranges.
I'll note that theory is the most certain science ever is. In this case, it means that over the last century and a half, plus the observations from before the theory's proposal, no evidence has been found that contradicts the theory of evolution. By the same token, gravity is a theory, and thermodynamics is a theory. 'Law' is just scientific shorthand for a theory that no one thinks will ever be disproved, and may soon be applied to evolution.
2. The theory that species give rise to other species. This process of speciation can be accomplished in a number of ways, all of which must result in two (or more) populations becoming genetically isolated. This can be accomplished physically (allopatry and peripatry) or through division of patch types or through behavioral mechanisms (sympatry). This has been observed at low taxonomic levels. For instance, wheat is a modern species resulting from 2 instances of non-disjunction and one hybridization event that all occurred within the last 5000 years. The original plant has been identified from seeds from tombs in Egypt.
The creation of new higher level taxa is often referred to as macroevolution by non-scientists, but this usage is incorrect. The only difference between the origins of higher taxa and species is time. Today's species will eventually give rise to genera as they continue to diverge from their sister-taxa and continue to speciate themselves. All higher taxa were once just a species. Macroevolution properly refers to selection that operates above the species level, such as the selective pressure across the K-T boundary on gastropods which favored genera (but not species) with wide geographic ranges.
I'll note that theory is the most certain science ever is. In this case, it means that over the last century and a half, plus the observations from before the theory's proposal, no evidence has been found that contradicts the theory of evolution. By the same token, gravity is a theory, and thermodynamics is a theory. 'Law' is just scientific shorthand for a theory that no one thinks will ever be disproved, and may soon be applied to evolution.
1. The reaction was in a critical phase of its evolution.
2. The fossil sequence of horses is an excellent example of evolution
2. The fossil sequence of horses is an excellent example of evolution
by Squirrelloid May 29, 2004
Get the Evolution mug.A German word used to describe someone who acts stupid or unthoughtful. Translated it would mean "Evolution brake".
Person 1: Lets try to run across the rails, when a train comes.
Person 2: Nein, du Evolutionsbremse (No you Evolution brake)
Person 2: Nein, du Evolutionsbremse (No you Evolution brake)
by Pegacraffft June 28, 2021
Get the Evolutionsbremse mug.Related Words
Mitsubishi Lancer Evolution 7
Engine: 2000 DOHC 16-valve Intercooler Turbo
Engine type: 280HP 4G63 Turbo
Bore x Stroke: 85.0 x 88.0
Displacement: 1997cc
Power: 206kW/6500
Torque: 383Nm/3500
Full-time 4WD
Transmission 5-speed manual
Steering: Rack & Pinion
Suspension: Front MacPherson Strut, Rear Muli-link
Brakes: front 17" BREMBO ventilated disc, Rear: 16" BREMBO ventilated disc
Length: 4455mm
Width: 1770mm
Height: 1400kg
Engine: 2000 DOHC 16-valve Intercooler Turbo
Engine type: 280HP 4G63 Turbo
Bore x Stroke: 85.0 x 88.0
Displacement: 1997cc
Power: 206kW/6500
Torque: 383Nm/3500
Full-time 4WD
Transmission 5-speed manual
Steering: Rack & Pinion
Suspension: Front MacPherson Strut, Rear Muli-link
Brakes: front 17" BREMBO ventilated disc, Rear: 16" BREMBO ventilated disc
Length: 4455mm
Width: 1770mm
Height: 1400kg
i love the evo's, i own an evo 7, mine isnt stock, 304HP HKS Racing Intake, HKS SSQ BOV, HKS Racing Exhaust, C-West Body Kit, 18"x 8" Enkei NT03 rims, 235/40/18 Yokohamma ADVAN AVS Sport Tires.
0-60: 4.2 sec
1/4 mi: 12.3 sec
Evo's from the Evo V and up are easily 10 second cars with little upgrades.
0-60: 4.2 sec
1/4 mi: 12.3 sec
Evo's from the Evo V and up are easily 10 second cars with little upgrades.
by Dave March 12, 2004
Get the lancer evolution mug.Evolution, the combination of such processes as Natural Selection, Sexual Selection, and others, is the subsequent collection of scientific processes that eventually change one organism into another. It is important to discount a few widely held myths here that Creationists often erroneously use to discount Evolution, bringing up half-baked ideas about how one or more "facts" disprove evolution, without bothering to actually know what they're talking about. However, a little care and attempt at education can easily clear up these mistakes:
1.) Evolution does NOT necessarily dictate that animals (or plants, or fungi, or whatever you fancy) must evolve into something more complex. If all animals over the size of cockroaches were wiped out tomorrow, that would be a form of evolution: the Cockroaches and smaller animals would be the surviving species, and "Survival of the Fittest" (a common saying used in evolution) would hold true.
2.) Evolution does NOT, I repeat NOT suggest that humans "magically appeared from crawling fish". Evolution takes time. HUGE amounts of time. We're talking about half a billion years here (~500,000,000)for the total evolution from the first protochordates into the modern Homo sapiens. Not a couple days. Not even a couple centuries. This time span is so long that it's often hard to comprehend. The changes were gradual, as some random "mistakes" in our DNA made some animals better able to adapt, and others not as able to adapt. It is NOT like throwing sand in the air and having it come down as a sand castle. It is, however, like sprinkling little tiny bits of sand here and there - sometimes a grain at a time - and eventually building up to a sandcastle. And sometimes having bits of the sandcastle knocked down.
3.) Species that died out, such as Homo neanderthalis (Neaderthal Man) are not counterexamples. In fact, it shows that two different species, with two different natural "sets of equipment", have different ways (and thus chances) of surviving or outlasting eachother. We and Neanderthals DID stem from the same common ancestor. However, whereas Neanderthals had stocky, tough, but not to bright build, we went the lean and brainy root. That was fine for a little while, but soon we outcompeted them, and they died out.
4.) In regards to the comment above that some species were found in the wrong area: The earth moves. Ever see a volcano? An earthquake? Rocks don't always just sit there.
5.) Any educated biologist will not respond by saying "oh, you're right, evolution didn't happen."
1.) Evolution does NOT necessarily dictate that animals (or plants, or fungi, or whatever you fancy) must evolve into something more complex. If all animals over the size of cockroaches were wiped out tomorrow, that would be a form of evolution: the Cockroaches and smaller animals would be the surviving species, and "Survival of the Fittest" (a common saying used in evolution) would hold true.
2.) Evolution does NOT, I repeat NOT suggest that humans "magically appeared from crawling fish". Evolution takes time. HUGE amounts of time. We're talking about half a billion years here (~500,000,000)for the total evolution from the first protochordates into the modern Homo sapiens. Not a couple days. Not even a couple centuries. This time span is so long that it's often hard to comprehend. The changes were gradual, as some random "mistakes" in our DNA made some animals better able to adapt, and others not as able to adapt. It is NOT like throwing sand in the air and having it come down as a sand castle. It is, however, like sprinkling little tiny bits of sand here and there - sometimes a grain at a time - and eventually building up to a sandcastle. And sometimes having bits of the sandcastle knocked down.
3.) Species that died out, such as Homo neanderthalis (Neaderthal Man) are not counterexamples. In fact, it shows that two different species, with two different natural "sets of equipment", have different ways (and thus chances) of surviving or outlasting eachother. We and Neanderthals DID stem from the same common ancestor. However, whereas Neanderthals had stocky, tough, but not to bright build, we went the lean and brainy root. That was fine for a little while, but soon we outcompeted them, and they died out.
4.) In regards to the comment above that some species were found in the wrong area: The earth moves. Ever see a volcano? An earthquake? Rocks don't always just sit there.
5.) Any educated biologist will not respond by saying "oh, you're right, evolution didn't happen."
Bill: But monkeys and fish look real different, so evolution must be wrong! Fish change into monkeys suddenly? LOL!
Jill: That's not really what Evolution says...
Jill: That's not really what Evolution says...
by Newms34 October 8, 2006
Get the Evolution mug.1. In biology: Descent with modification. Change in the genetic composition of a population during successive generations, as a result of natural selection acting on the genetic variation among individuals, and resulting in the development of new species.
2. In everyday speech: A gradual process in which something changes into a different and usually more complex or better form.
2. In everyday speech: A gradual process in which something changes into a different and usually more complex or better form.
1. Darwin's theory of evolution does for biology what quantum mechanics does for physics.
2. It is interesting to note the evolution in computers over the years.
2. It is interesting to note the evolution in computers over the years.
by OneBadAsp October 21, 2006
Get the Evolution mug.Words created to fill a void in the language, usually spontaneously created during conversation. Terms created through evolutionary vogabulary are usually a combination of two or more words, that when woven together more perfectly express an idea.
Annie, Felisa, and Peter were discussing the night that Charlotte got petrifurious at Peter for jumping out of the bushes along the dark walkway next to their house. She cried the whole time she whaled on him, and he was laughing so hard he couldn't get her to stop until he was pissterical. Annie realized that in their rush to define the event, they had discovered evolutionary vogabulary.
by Annie P. November 26, 2005
Get the evolutionary vogabulary mug.by Jaq Lemur February 28, 2009
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