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Evolution

Definition

noun, plural: evolutions

(1) The change in genetic composition of a population over successive generations, which may be caused by natural selection, inbreeding, hybridization, or mutation.

(2) The sequence of events depicting the evolutionary development of a species or of a group of related organisms; phylogeny.


Supplement

In order for evolution to occur, there must be genetic variation. Genetic variation brings about evolution. Without it there will be no evolution. There are two major mechanisms that drive evolution. First is natural selection. Individuals with advantageous traits are more likely to reproduce successfully, passing these traits to the next generation. This kind of evolution driven by natural selection is called adaptive evolution. Another mechanism involves genetic drift, which produces random changes in the frequency of traits in a population. Evolution that arises from genetic drift is called neutral evolution.


Word origin: Latin evolutio (“an unrolling, unfolding”), ex- (“from, out of”) + volere (“to roll”).

See also: Darwinism.

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Results from our forum


Chromosome Differences

Long chromosomes brake apart accidentally and selected eventually during evolution.

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by josem
Thu Sep 04, 2014 10:15 pm
 
Forum: Genetics
Topic: Chromosome Differences
Replies: 5
Views: 285

Chromosome Differences

... handling of large DNA molecule or chomosome may be difficult during replication or mitosis, so small DNA molecule selected during the course of evolution. We can see chromosomes number is usually increased from lower to higher eukaryotes or lower to higher complexity of genome.

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by josem
Wed Sep 03, 2014 8:47 pm
 
Forum: Genetics
Topic: Chromosome Differences
Replies: 5
Views: 285

Dr. Jobe Martin Arguments

... position as gospel. They are good people - may are engineers and I have known doctors and biologists who hold to that position - adamant that evolution is a bad explanation. I would refer people here to a book by a man ho taught biology all of his life at Gordon College - a Christian school. ...

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by green3611
Sat Aug 30, 2014 9:26 pm
 
Forum: Evolution
Topic: Dr. Jobe Martin Arguments
Replies: 7
Views: 9623

Microevolution verus Macroevolution

I don't understand how there could be any difference between micro and macro evolution. Surely any life form large enough to contain genes would evolve in exactly the same way? The genes don't really care how big an organism is going to grow. Their job is simply ...

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by animartco
Sun Jul 06, 2014 3:17 pm
 
Forum: Evolution
Topic: Microevolution verus Macroevolution
Replies: 16
Views: 21059

Re: Is DNA living or non-living thing?? get the answer here

... רק אם הצליחה "לבלוע" אנרגיה. אם אינה "מצליחה" להשיג אנרגיה היא נבלעת ע"י תצורת חומר אחרת ומשמשת לה אנרגיה. אכול או היאכל. Evolution Derives From Gravity The quantity of mass in the universe is constant since the universe started its last self-replication, since its last ...

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by Dov Henis
Fri Jul 04, 2014 8:00 am
 
Forum: Molecular Biology
Topic: Is DNA living or non-living thing?? get the answer here
Replies: 24
Views: 54659
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