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Evolution
The scientific theory according to which populations change gradually through a process of natural selection.
5,264 Questions
Describe the principles of natural and artificial selection?
Natural selection occurs when ecological pressures "select" for one trait over another. For example, if it is cold, an animal with a heavier coat will survive longer than one with a thin coat. The one with the heavy coat will have more offspring and that gene will be more frequent in the gene pool than the gene for a thin coat.
Artifical selection occurs when a desirable trait is selected and an undesirable one is not. For example, a long flowing coat on a dog may be more desirable to a breeder than a short, ragged coat. The breeder selects the genes.
What website can show evolution is real?
There are plenty. Try the Wikipedia article on evolution, for example; it includes a list of scirntific sources and records which explain the evidence and how it supports the theory. Of course, you shouldn't need a website to tell you; just look at the evidence and there aren't many ways to explain it better (scientifically speaking; God is not scientific and therefore excluded from any scientific discussion of evolution).
Does each eye of a spider provides the same sensory input to the brain?
I'm very unsure of that question, try looking it up in a spider diagram in a book or look at some google images of a diagram of a spider.
The theory of evolution is most accurately described as?
The central theory of modern biology, which illuminates all aspects of that science.
Describe the coevolution of monarch butterflies and milkweed?
they coevoled as plant and pollintor , that means they both rely on each other to survive
What was Wallaces role in the theory of natural selection?
Alfred Russel Wallace independently developed the theory of natural selection around the same time as Charles Darwin. His work on biogeography and observations of species distribution helped support the idea of evolution through natural selection. Wallace's paper on the subject prompted Darwin to publish his own theory, resulting in both men being credited with the theory of natural selection.
What laws are there in Nevada regarding the teaching of evolution and creation in school?
Nevada is pretty evolution friendly when it comes to its science standards. Nevada is also one of the few states that doesn't have a big evolution-creation controversy.
What are scientific ideas about the origins of humanity?
The most commons scientific idea about the origins of humanity is that, through many many years of evolution, came from apes. Because our DNA differs by only 2%, scientists believe we evolved from apes and other monkeys and gorillas and such.
Look to Darwin's finches to see how one species coming from the South American mainland to the Galapagos Islands could radiate throughout the many islands and change in size, color, feeding habits and beak size by adapting to the immediate environments and being subject to competitive exclusion pressures for territory and types of foodstuffs.
Are creation and evolution connected or separate issues?
Special creation holds that the world and all its creatures were created in an extremely short period, usually about 6,000 years ago, and that those creatures remain in much the same form as when they were first created. This is a religious belief and is entirely inconsistent with the facts of evolution.
Others interpret the Bible in such a way as to harmonise it, to a greater or lesser extent, with science and evolution. Even if not directly connected with evolution, these views are no always inconsistent with evolution.
What is important is that the Theory of Evolution is based on empirical evidence and explains how we came to be here, but does not attempt to explain why we are here. Religion should attempt to explain a different issue - why we are here. As long as science and religion remain within their own magisteria, there need be no conflict. There is no reason that a Christian, Hindu or follower of any other religion should not believe in his or her own creation God, while still understanding and accepting the science of evolution.
AnswerWhile some believe evolution was the vehicle for the creation of life, others do not. Both camps utilize the same evidence, but interpret it differently. The scientist who believes God created the earth and life directly sees abundant evidence for this, while another scientist who does not accept the view will look to evolution as the explanation. So they can be both separate or connected issues depending on your viewpoint. However, creation cannot be easily separated from God. Evolution, in the opinion of some, has nothing to do with God since it contradicts the plainest meaning of Genesis and would require the existence of death and suffering prior to the Fall of man.
What were the different stages of evolution of man?
Evolution does not exactly work in specific stages. It is not like a clutch system, in which evolution starts at first gear, and as it accelerates, moves to higher gears. It is simply progressive, but ongoing. You cannot say something is in 'stage 1' of its evolution, only that it is early-on. True, the title 'human' has been bestowed to less-evolved species than Homo sapiens, though this is technically incorrect. Species from which modern humans evolved have been from various earlier-existing genera, but such classification is, to some degree, a grey-area science; it's hard to classify exactly at what point something ceases to belong to one species and starts to belong to another, let alone in the case of a change of genus.
The closest thing I can give to answer your question is that humans evolved from smaller, less sophisticated Great Apes, which evolved from Lesser Apes. Lesser Apes evolved from monkeys, which evolved from less complicated primates. Primates, if you look far enough back, evolved from versatile, rodent-like animals. These small rodent-like animals evolved from even smaller, less complicated animals. If one follows this progression far enough back, one finds a series of prokaryotic cells, that emerged from puddles of amino acids, to one day become humans.
What is the book written by Lamarck?
Lamarck wrote the three-volume Flora Française, and a few years later the Système des Animaux Sans Vertèbres. If just one of these two monumental undertakings is not enough to put this remarkable investigator into the top of the ranks of the naturalists, then no one belongs there.
Are you a student of biology, either the general science of any of its more specific branches? Use the link to an article on Jean-Baptiste Lamarck. Read this and know your roots as you pay your respects to someone who spent the bulk of his life to the advancement of human knowledge in the life sciences.
Eukaryotic cells are believed to have originated around 1.6-2.1 billion years ago. They are much younger compared to prokaryotic cells, which are estimated to have appeared around 3.5 billion years ago.
Why are only a few important genetic studies done on small - isolated populations?
Actually, important small-Studies are being performed continuously on all small and Isolated AREAS. See Nat. Geog. Mag. (this month) for the latest in [newly discovered] amazingly Colorful Bugs.
What might the depth of a footprint tell an interpreter?
What might depth of a footprint tell an interpreter?
Who developed the theory evolution?
The theory of evolution by natural selection was developed most fully by two men. Robert Charles Darwin and Alfred Russel Wallace. Since that time, a hundred and fifty one years ago, many more people have contributed to the theory.
What were the problems with dinosaurs and evolution?
Dinosaurs were a very successful type of organism who lived on Earth for many millions of years before something, probably a giant asteroid collision, wiped them out. Perhaps, in retrospect, being so extremely large made them vulnerable to certain types of environmental change, when smaller species proved to be more adaptable. Bigger is not always better. Notably, smaller species of feathered dinosaur did survive, and still exist today.
Does creation science pose a serious challenge to evolution?
No. Everything that creationists have ever pointed to that might disprove evolution has never pointed to creationism being true.
Creationists have given examples of things that they think can disprove evolution. For example, the person before me posted this, "recently they found a fossilized miners hat only thirty years old." I would like to point out that the hat wasn't a fossil, it was made of concrete. Also scientists have known for decades that fossilization can occur rapidly (i.e. Le Brae Tar Pits). And he also posted this, "(Creation scientists) have many scientific facts and things that definitely pose a problem to the evolutionist position." However there is no mention to what that is and everything that has thus far been reportd in a creation magazine has been refuted and debunked.
It is commonly said that "With DNA research, the once thought closeness of man to chimpanzees is now lower than 75% genetically," but that is not true. The genetic "closeness" of humans and chimpanzees is still about 95%. And lastly, "The scientific understanding of the circulatory system shows that the intake and release of oxygen and carbon dioxide too complicated under normal conditions, that would make a warm blooded mammal cease existence, if the intricate balance God created did not exist from the start." However that, also, is not true.
Why does Darwin use a tree as a model for the evolution of animals?
Darwin used a tree as a model for the evolution of animals to represent the divergence of species from a common ancestor. Just as branches on a tree diverge from a common trunk, species evolve and diverge from a common ancestor through natural selection and adaptation. This visual representation helped illustrate the concept of common ancestry and the branching of species over time.
Darwin's theory of evolution by natural selection explains that organisms best suited to their environment are more likely to survive and reproduce. When environmental conditions change or when species cannot adapt to new challenges, such as competition for resources, predation, or disease, those less adapted may fail to survive. Over time, this can lead to a decline in population numbers and ultimately extinction. Thus, extinction occurs when a species cannot keep pace with the demands of its environment or evolutionary pressures.
Geology provided Darwin with evidence of gradual changes in Earth's landscape over vast time scales. This concept of gradual change and Earth's ancient history influenced Darwin's thinking about the gradual evolution of species through natural selection. Additionally, studying the distribution of fossils and geological formations helped Darwin develop his ideas about species diversification and adaptation to changing environments.
What is the evolution of tennis balls?
Tennis balls have evolved significantly since the sport's inception in the late 19th century. Initially made of leather and filled with hair, they transitioned to rubber cores covered with felt to improve durability and performance. The introduction of vibrant neon yellow balls in the 1970s enhanced visibility for players and spectators alike. Today, tennis balls are manufactured with advanced materials and technologies to ensure optimal performance on various court surfaces.
