What is an example of evolution?
The peacock, though it is often used by creationists as an argument against evolution, is a great example of how it works. It has been proved that peahens will choose males with brighter colors. Therefor, if they continue to only mate with the brightest males, then only the brightest males will pass on their genes, and then only the brightest of that generation will pass on their genes. Over time brighter and brighter birds emerge until you have something as flamboyant and unnecessary as the peacock. Because of this, the alleles for the less bright peacocks will fade away (natural selection).
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Answer . A bacteria has evolved to be able to consume nylon, a product invented only in 1935.
Basically, divergence is the "default mode" of evolution. So virtually all species you can think of would be examples of divergence. Even in cases of parallel and convergent evolution, the underlying genomes will continue to diverge. An often used example of divergent evolution in the morphological …and behavioural sense is Darwin's finches . (MORE)
Convergent evolution is said to have occurred when species whichare very different from one another have developed very similartraits. This type of evolution is said to happen as a result ofhaving to adapt to specific environments, such as a tundra. Anexample of convergent evolution in the tundra is… the arctic fox. (MORE)
This is when one animal will evolve into two different species.Many animals and insects will do this in certain areas.
no the caterpillar is just going through a metamorphosis. You could say that the caterpillar species evolved to go through a metamorphosis.
Evolution is the change in allele frequency over time in a population of organisms. This is observed and observable. In plant this can be seen in one generation by the process of polyploidy. Where chromosome number can double, for example, in one mating and thus fulfill the definition of both evolut…ion and speciation. (MORE)
birds are evolved from reptiles and the proof is the fossil record of archeopterix.......which is half bird and half reptile.
My favourite example of evolution is the development of multicellular organisms (this has also been observed). A kind of eukaryotic cell once started to bind to its fellow cells in order to make it more difficult for predators to kill them. This is an example of evolution as a result of predation, a… selective agent. (MORE)
1. Rudimentary parts. For example, whales and snakes, who have absolutely no use for a pelvis or legs, still have useless remnants of these hidden internally. This shows that their ancestors did have legs, and eventually evolved to not need them anymore. Therefor, they slowly shrank over time to con…serve energy that would be wasted maintaining such a useless part. Another example are the nipples on many male animals, which show evidence of a hermaphrodite ancestor. 2. The range of given organisms. For example, on most islands, there are no native terrestrial mammals or amphibians because they wouldn't be able to cross an ocean or sea. 3. Humans even use the same characteristics of evolution to our benefit. Humans will pick organisms best suited to our benefit, whereas nature selects organisms best suited to survive and reproduce. In both cases, they get the opportunity to have offspring, which carry these desirable traits, and the process continues. Over time, a remarkably distinct variety can develop, for example, the Berlin short faced tumbler. In nature, we already see examples of this, as new varieties of pesticide resistant insects and antibiotic resistant bacteria evolve. (MORE)
Polyploidy in plants, for one instance the doubling of chromosomes at mating, is direct evidence not only for evolution but for speciation as well. I fact many to most modern angiosperm species are developed this way.
In terms of biological evolution, every species on Earth has evolved from previous species, and every anatomical feature, and every chemical pathway or other biological trait is also the product of evolution. Multicellular organisms evolved from unicellular organisms. Mammals and birds both evolved …from reptiles, which evolved from amphibians which evolved from fish. (alternate answer) Evolution is still a theory. mainly because no has been able to explain why if a species "evolved" do we still have the original species... and why do we not have hundreds of transitional, "inbetweener", species. If an elephant came from a frog... there should be something in between. Are we to believe that something came from nothing, all by it's self... (reply to alternate answer) Evolution is still a theory, because theories are what science produces. Only religion produces dogma. Plenty of species are extinct, so I do not see the basis for your question ""why do we still have the original species?" However, evolution is not always a process of replacement. It is also a process of filling new ecological niches. So an earlier species can fill one niche while a later species that evolved from the earlier species can fill a different niche. Then there is the claim that "If an elephant came from a frog...there should be something in between" We don't know that the evolution of elephants can be traced directly to frogs, although in general (as I said previously) mammals did evolve from reptiles which evolved from amphibians. But of course, this means that there was something in between frogs and elephants. Actually there would have been a great many intermediary phases, some of which species still exist, and others of which are extinct. Finally, nothing in the theory of evolution says that something came from nothing, all by itself. Each step of evolution comes from a previous step, and the first step of biological evolution is non-living matter, known as the primordial soup. And that too can be traced back, step by step, as far as the Big Bang. The origin of the Big Bang itself falls beyond the realm of biological evolution and is a complex topic, and that too is not something from nothing (but I am not going to get into the details, which would be a digression). Also, for Creationists, it does you no good to complain that evolution tries to make something from nothing. You have no explanation of where God comes from. Your theory is the one that tries to come up with something from nothing. (MORE)
Cultural evolution regards the changes and adaptations to asocieties identity, sensitivities, perspectives, and behaviors overtime. The transformation of closed societies to globalization is amajor example of cultural evolution in action. Demographic changesand global migration are also another driv…ing example of howcultures are rapidly adapting and evolving, (MORE)
Humankind is the perfect example. We have shown with fossils that there are numerous transitional forms, from apelike predecessors, to simple hominins to hominids, to more recent ancestors to the modern homo sapiens . We have shown via genetic, physiological and anatomic comparisons that humans are… closely related to certain apes, then somewhat less closely related to other primates, then less closely again to certain groups of mammals, and then less closely again to the rets of mammals. (MORE)
An example of direct evidence for evolution is found in CAM and C4 plants. Photosynthetic adaptations such as C4 and CAM plants represent alternate modes of carbon fixation that have evolved to minimize photorespiration and optimize the Calvin cycle, even in hot climates. Although rubisco catalyzes …carbon fixation, the first step of the Calvin cycle, it adds oxygen to the Calvin cycle instead of carbon dioxide when carbon dioxide becomes scarce. This process is called photorespiration and consumes light, oxygen, and ATP, releasing carbon dioxide; it does not produce any sugar or ATP. The existence of photorespiration seems to be an evolutionary relic from before the oxygen revolution when the atmosphere had much less oxygen and more carbon dioxide. Rubisco's affinity to oxygen would not have mattered in this atmosphere. Over time, adaptations such as C4 and CAM plants have evolved, especially since photorespiration does not seem to benefit plants as it releases much of the fixed carbon. C4 plants "overcome" rubisco's affinity to oxygen by structurally separating the first steps of carbon fixation from the Calvin cycle and then conveying the carbon dioxide atoms to the Calvin cycle in the bundle-sheath cells. This prior step is carried out in the mesophyll cells by PEP carboxylase, which has no affinity for oxygen and a much higher affinity for carbon dioxide than rubisco. CAM plants also incorporate carbon dioxide into organic intermediates before entering the Calvin cycle. However, they open their stomata and fix carbon into organic acids at night, closing their stomata during the day when the carbon dioxide is incorporated into sugar in the chloroplasts with the help of the light reactions. Both C4 and CAM adaptations have evolved to minimize photorespiration and enhance sugar production. (MORE)
Almost any animal you can name is evolving to some degree. However, specific examples include AIDS and influenza, which are constantly evolving at a rate we can discern, as do most bacteria and viruses.
Fossils show certain species underwent small changes over a period of years the rock in which the fossil is encased dates the fossil and so they can put them in order to show the progression of the physical changes
There are countless examples that evolution is present and active on Earth- 1. Darwin's finches evolved varying beaks that suited different forms of food that was consumed. The beaks are continuing to evolve to this day. 2. A population of tropical butterflies (Blue Moon butterflies) have evolved… a resistance to a deadly bacteria. The Bacteria infects the female and then attacks the male eggs and kills them before they hatch. In under a year (10 generations for butterflies) the butterflies have the bacteria under control with a "suppressor gene" that was discovered in the butterfly. 3. An Australian breed of lizard have gradually (over 3 million years) evolved to lose their limbs and become more snakelike. Not all evolution is as fast as the Blue Moon butterfly, however- there is proof that evolution is ongoing and inevitable part of life. (MORE)
"why the theory of evolution is true" ... you seem to assume that it is true. I can give two examples of why it's not true. 1.) it contradicts the laws of thermodynamics. (matter tends to go from order to disorder) 2.) The stunning amount of stars that exist. Gasses tend to dissipate, not pull t…ogether with gravity; it's far too weak. The only way for it to work is by a supernova to hit a nebulae and mush it together, but that would NEVER create the 100,000,000,000,000,000,000,000 or more stars out there by chance. EVER. (MORE)
Evolution believes that life was formed from nutrients at thebottom of oceans around volcanic pillars a few billion years ago,then evolved into the creatures we are today over billion of years.
The giraffe needed to reach the juicy leaves on the tops of the trees, over a long period of time the trees probably got taller, as did the giraffe
An example of evolution by natural selection would be: There is a species of beetle living in a wooded forest full of yellow flowers. Thankfully the beetle is colored to look like the plant and hides extremely well. But a sudden disease kills off the yellow flowers leaving only a species of red fl…owers behind. As the beetles go on, the ones with darker or redish colorations reproduce more than the lighter or yellowish colored beetles which are less camoflouged. As a result, only the beetles with redish colorations survive and they evolve to become the same red coloration of the new flowers. (MORE)
Whale fins remodeled from the legs of a ground dwelling animal over some millions of years. The bones are of the same construction and number, just overlaid with flippers now.
They are well adapted to their environment due to change over time in their allele frequency.
Yes , pesticide resistance is an example ofevolution. Specifically, evolution can embrace a changed reaction to a changedenvironment. Pesticide use effects environmental changes throughthe injection of active ingredients to chase away, decrease thenumbers of, or eliminate the presence of fauna and …flora deemed tobe unwanted, unwelcome irritants. Some pests succumb to pesticidetreatments whereas others survive with stronger, tougher immunesystems. (MORE)
Birds and bats have adapted to flight in a similar way. Their wings are analogous (as opposed to homologous).
Australopithecus an amersis to Australopithecus afarnesis and Australopithecus bahrelghazal. Australopithecus afarensis to Australopithecus africanus to Australopithecus garhi. Australopithecus afarensis to Paranthropus aethiopicus. Australopithecus atheiopicus to paranthropus boisel and paranthropu…s robustus. (MORE)
The human foot verses the chimpanzees foot, for instance. Both organisms diverged from common ancestry, but their feet were subject to vastly different environmental pressures and function in very different ways now, though their commonality is rather obvious.
Evolution as science is probably the most thoroughly debunked aspect of communism. Based on wild theories about the most surface level similarities in how various species look, evolution simply fails whenever put the simplest test of observation. Simply put, there are no missing links. Evolution, we…re it true, would result in near infinite variation in the fossil record with clear progression as one species "evolved" into another. Nowhere, despite MILLIONS of examples of fossils, does this happen. Even bacteria, that can be forced to undergo millions of generations of reproduction in short periods of time, fail to show the slightest evidence of "evolution". There are mutations. But mutation RARELY proves beneficial and usually results in that particular bacteria dying. NEVER do you see one type of bacteria becoming a new type of bacteria. Furthermore, the evolutionary explanation life is patently absurd, and violates a prime tenant of biology (that life only originates from life and never from non-life). Evolution is not and never was a legitimate scientific theory. Instead, it's a form of pseudo-science with only the purpose of putting forth a lame alternative explanation for the human condition to challenge the bible. And the purpose of THAT was to convince deeply religious societies to secularize and accept the unacceptable....genocide, slavery etc. under marxism. As such it's part of similar pseudo-science not based on legitimate scientific method but instead, designed to manipulate people by attempting to apply the legitimacy of science to something malevolent and absurd. Another example is freudian theory. Other examples are sociology. All these things are similar. They describe nebulous, hard to examine processes, that challenge common sense.....and what scientific observation is possible (or becomes possible through technological advancement) is in direct contradiction to the theory.....yet the theory is not abandoned. More to the point, these theories are used to advance morbid ideologies (nazism, stalinism, satanism etc.) and NOT integrated into the rest of scientific knowledge. You will never find, for example, evolution contributing to related scientific discoveries. Not only can it not....but adherents shield it as much as they can from close scrutiny....to the point of fraud. You may have been taught in school various examples of evolution in action (I know I was) but what was not mentioned were these were, without exception discovered to be frauds......from the peppered moths (painted) to Piltdown man (an orangutan fraudulently put forth as the missing link).....all frauds. And I challenge you to find a single exception (you won't). (MORE)
There are no examples of 'evolution' happening today. People look at a type of bird in England then a bird in Hawaii. It's the same type of bird, but they look different. Unfortunately, many people's answer is,"Evolution!". The truth is, the birds probably flew there, laid some eggs, and began to ad…apt to the weather. Naturally, you wear different clothes in Europe than in the tropics. Adaption, not evolution is the answer. Answer: There are numerous examples of present day evolution. The most common is the ability of microbes and bacteria to evolve to not be treatable by old antibiotics. On a larger scale we have only recently (3,000 years or so) evolved the ability to digest milk when we are adults. This mutation occurred independently in both Africa and Europe. Even more recently some populations in Africa are developing an increasing ability to resist AIDS. Again because the people with the changes to allow them to survive are surviving and passing on inheritable traits. (MORE)
In preparation for Charles Darwin's upcoming 200th birthday, the editors of Nature compiled a selection of especially elegant and enlightening examples of evolution. digg They describe it as a resource "for those wishing to spread awareness of evidence for evolution by natural selection." Given …the continuing battles over evolution in America's public schools - and, for that matter, the Islamic world - such a resource is most welcome. However, I'd like to suggest another way of looking at the findings below, which range from the moray eel's remarkable second jaw to the unexpected plumage of dinosaurs. They are, quite simply, wondrous - glimpses through an evolutionary frame of life's incredible narrative, expanding to fill every possible nook and cranny of Earth's biosphere. After all, it's hard to stir passion about the scientific validity of evolution without first captivating minds and imaginations. And this is a fine place to start. ://wiki.answers.com/wiredscience/wp-content/image.php?u=/images blogs/photos/uncategorized/2008/12/30/nat1indohyus2.jpg Almost, But Not Quite, a Whale. The fossil record suggests that whales evolved on land, and intermediate species have been identified. But what of their last terrestrial ancestor? In 2007, researchers showed that Indohyus - a 50 million-year-old, dog-sized member of the extinct raoellidae ungulate family - had ears, teeth and bones that resembled whales, not other raoellids. Image: Hans Thewissen / Nature ://wiki.answers.com/wiredscience/wp-content/image.php?u=/images blogs/photos/uncategorized/2008/12/30/nat1tiktaalik.jpg Out of the Soup. Whales represented a mammalian return to the water, but an even more extraordinary transition was made by the first creature to venture onto land - and that was made possible by Tiktaalik, discovered in 2004 on Ellesmere Island. Tiktaalik had a flexible neck and limb-like fins suitable for shallow waters, and, before long, land. Image: Ted Daeschler / Nature ://wiki.answers.com/wiredscience/wp-content/image.php?u=/images blogs/photos/uncategorized/2008/12/30/nat3feathereddinoa.jpg Dinosaurs of a Feather. Archaeopteryx, found in 1861, was long thought to be the first bird. Then it was recognized as something closer to a dinosaur with feathers - but still unique for that. In the 1980's, however, paleontologists digging in deposits more than 65 million years old in northern China found feathered dinosaurs which very definitely did not fly. Some dinosaurs, it appeared, may have looked far different from our traditional conception - and feathers may first have served an insulating or aesthetic, rather than aerodynamic, purpose. Image: Zhao Chuang & Xing Lida / Nature ://wiki.answers.com/wiredscience/wp-content/image.php?u=/images blogs/photos/uncategorized/2008/12/30/nat4teeth.jpg A Toothy Finding. In 2007, University of Helsinki evolutionary biologist Kathryn Kavanagh showed that molars emerge from front to back, with each tooth smaller than its precedent. Fodder for geeked-out dentists? Far from it: Her model predicted tooth development of rodents with different diets - a perfect confluence of a small mechanical observation and observed evolutionary trajectories. (MORE)
In the past, finch-like birds from South America reached the Galapagos Islands where they became isolated. The finches spread into different niches and over time evolved into the many distinct species of the Islands.
If you use the micro-macro dichotomy then no Speciation is macro evolution. To be precise, biologists, though many biology texts do not conform, say evolution and speciation.
Evolution is a property of living things. Heat and light do not have genes and therefore cannot evolve.
The development of resistance to antibiotics by bacteria is a real world example of evolution.
The eye is a good example because there are living animals with eyes that represent each step in it's evolution. Human eyes also show how evolution can produce "bad" results; the retina is essentially "inside-out" - the nerves are on top and there is a blind-spot where the optic nerve leaves the eye…. (MORE)
You are an example of human micro-evolution as the population of humans has changed allele frequency over time. Micro-evolution is just evolution; change over time.
The peppered moth story only provides evidence for genetic intrinsic computer programs (DNA) of different types of Flora and Fauna...in this case...moths. It does not give evidence for increase complexities of the original DNA and protein coupled systems (involving new organs or body plans). It does… not show us how moths came into existence in the first place...the paleontological etiology of moths is NOT addressed by the peppered moths model. The potential for white and dark moths to be targeted by predators is based on contrasting variables of the moths to their background. NO NEW MOTH IS INTRODUCED...only a natural (conservative) process of elimination occurs...and the frequency of reproduction increases for the remaining types of moth. Evolution has NEVER been substantiated by experimentally derived evidence. (MORE)
All reproductively isolated populations diverge genetically. Even in cases where convergent evolution occurs, this is only at the behavioural and morphological level. At the molecular and the genetic level, even these instances still diverge at the genetic level.
A common example of evolutionary adaptation is that of the giraffepopulation eventually having longer necks, even though they havethe same number of vertebrae as humans and most other mammals. Evolution is driven by two things: random mutation and naturalselection. Mutations add to the variability …within a population andnatural selection is like a filter that selects and propagatesadaptive traits that provide some competitive advantage toindividuals that have it. To elaborate on the above example, there is naturally occurringvariation within a giraffe population (as there is within anyspecies), so that some individuals are born with slightly longernecks than others. During drought or famine, these are better ableto reach higher branches on trees, gaining more food energy tosurvive and reproduce. In subsequent generations that inherit thesetraits, still others may be born with slightly longer necks thanaverage, and thereby gain further competitive advantage forthemselves and their offspring. Over the course of manygenerations, those with better survival traits increase in number,while those without it decline in number. It is worth noting that, while an individual can be born with anadaptation, evolution does not apply to individuals; evolutionpertains to gene pools within populations or species, and occursover many generations. (MORE)
Only a creationist would use such a term, but there are many examples of evolution in the fossil record. The evolution of whales from fossils found mainly in Pakistan is well documented and we know that their ancestor was a four-footed land animal. Using genetic testing we know the nearest living re…lative of whales is the hippopotamus. The evolution of the horse is also known from fossils over the past 60 million years as is that of birds over the same time-span. (MORE)
Yes. For instance, vertebrates and octopuses evolved a very similar type of eye, independently from one another.
There are many thousands of papers, even considering only recentpublications, that detail examples of contemporary evolution. Someof these are about experimental evolution, others aboutobservations of evolution in the wild. The following (fairly recent) paper details one of suchobservations, in thi…s case about the influences of human settlementon the behavioural and morphological development of populations ofblackcaps: Rolshausen et al, 2009, Contemporary evolution of reproductiveisolation and phenotypic divergence in sympatry along a migratorydivide , Current Biology 19. (MORE)
Such examples are too numerous to comprehensively list in just a short answer. Fact is, the evidences Darwin listed are the most basic observations: science back then could provide no more. Since then, science has advanced greatly, and 150 years worth of genetics, molecular biology, embryology, p…alaeontology, zoology, population dynamics, and so forth, and so on, have been added to the list of observations supporting Darwin's theory of evolution describing how species originate through inherited reproductive variation and differential reproductive success. To name just a few examples, however: - Genetics and genomics in general. The way the genome is encoded, the mechanisms that allow for variation and mutation, are consistent with what would be expected from evolutionary theory. The nested hierarchies we find pervading the genomes of all lifekind match what we would expect from common descent. - ERV's specifically. ERV's with a more or less random insertion locus that are nevertheless found in the same exact loci across species boundaries support common descent. - Human chromosome #2. The extra centromere and telomeric regions in human chromosome #2 are exactly what we would expect to find if humans and the other Great Apes shared a common ancestor. - The GULO gene in apes and guinea pigs. The similarities between the dysfunctional GULO genes in primates, and the differences with the dysfunctional GULO genes in guinea pigs are exactly what we would expect to find if humans shared a more recent common ancestor with apes than with guinea pigs. - Gill arches in embryos of higher vertebrates. Part of a growing list of atavisms showing homology with deeper layers of the nested hierarchies of life. - Genes for teeth in birds. As above, these also are exactly what we would expect to find if birds evolved from animals with teeth, ie. earlier dinosaurs. I'll stop here, because I could go on for years, typing new examples day and night, and not even manage to keep up with new publications coming out every week, in journals on genetics, genomics, palaeontology, embryology and other life sciences. (MORE)
Though the forelimb of your cat or dog does not look much like your arms these are homologous structures that are almost identical bone for bone. This shows the common ancestry of all tetrapods and the closer common ancestry of you and your mammal pets.
Embryological development often produces atavistic features thataren't found in the adult form, but are found in more basal formsof the same lineage. An example of this is the pharyngeal archesfound in embryological stages of human beings. At one stage, theyare indistinguishable from the structures …that form gill pouches inother animals - but in mammals, they develop into other structures.Another example is the hind limbs on whales: at some stage duringthe embryological development of a whale, the embryo forms hind leglimb buds, the same as embryos of the land-based animals from whichit descended. Often, such buds are then reabsorbed. Many whales,however, retain some vestigial form of their hind leg bones. But atavisms aren't the only or even the best example of evidencefrom embryology: each and every single developmental feature inembryology fits neatly in a pattern of nested hierarchies thatpermeates all of life at every level of observation. It is thispattern that gives us the definitive proof of common descent, and,more importantly, allows us to determine the lineage of an animal,and its place in the evolutionary tapestry of life. (MORE)
Two related examples are comparative morphology and comparativeembryology. Look at the fore limb of your dog or cat and you cansee, bone for bone, common ancestry between you and your pets. Now,of one looks at the early development of all organisms underdiscussion here one will see remarkable simila…rities inembryological development. HOX control genes doing pretty much thesame things in you and your pets. Special creation could notexplain this in a satisfactory manner, but evolutionary processesdo explain this very well. (MORE)
One possible example of rapid adaptation to a changing environmentis the Italian wall lizard - Podarcis sicula. In 1971, ten adult P.sicula specimens from the island of KopiÅ¡te were transported 3.5 kmeast to the island of MrÄara, where they founded a new bottleneckedpopulation. When scientists… returned to assay the populations onthis island decades later, they found that descendants of thisfounding population had changed significantly in behaviour andmorphology: they had shifted from being primarily insectivore tobeing primarily herbivore, and had developed territorial behaviourand changes to their digestive systems to match. (MORE)
Pesticide resistance is evolution because pests are adapting topesticides to be able to resist their effects.
No it is not. Evolution is a natural process of adaption forsurvivability over thousands of years. Designer dogs are a resultof a man made process (selective breeding) for profit over a shortperiod of time.
some examples If the change is not good and not around the next generation, then it is non-evolutionary. A cowwith a foot growing out its shoulder, comes to mind.