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Evolution
The scientific theory according to which populations change gradually through a process of natural selection.
5,264 Questions
Both contain DNA
What is the continuous gradation in allele frequencies over space is known as?
Evolution. Interesting way to put, evolution is the change in allele frequency over time in a population of organisms.
What genetic change is always a result of evolution?
Evolution is not a cause of genetic change: it is the effect of genetic change.
Does evidence support both punctuated equilibrium and gradualism?
Evidence supports a model in which periods of relative stability are punctuated by short periods of rapid (relatively speaking) change. It could, theoretically, be possible for evolution to proceed in a gradual manner. However, mathematical modelling and fossil evidence show that punctuated equilibrium is the norm.
What type of organism is a lion natural selection or selective breeding?
A lion is naturally selected, at least in the wild. Dogs are selectively breed.
Why was the evolution of nucleic acids important to the evolution of protocells?
Nucleic acids have a number of important features. They are self replicating, and they also have the capacity to synthesize proteins. These proteins, in turn, can regulate or cause all other biochemical processes involved in life. So nucleic acids become the means to store information about how any organism functions, and to bring about those functions as needed.
What is a hypothetical population?
Statistical population which has no real existence but is imagined to be generated by repetitions of events of a certain type.
False
For humans, a motor skill that is common among all cultures.
No, evolution is not directional as the definition is; the change in allele frequency over time in a population of organisms. Google barnacle to see that evolution has no particular direction, but the adaption of the organism to the immediate environment.
What evidence does Walton provide of his romantic leanings?
You could find other reasons, but an obvious example is Walton's wonder at the rough beauty of the north.
You do not want to change though you believe in evolution?
I do not ' believe ' in evolution, but I am convinced by the evidence.
That evidence is homologous. Shared common ancestry. In this case you could trace this homology back as far as the common ancestor of gorillas and hominid fossils, or as far back as the emergence of all tetrapods.
What happens when Rare allele is in a small population?
The smaller the population the greater the frequency the allele will increase. When the Old Order Amish came to America in 1744 it was a husband and wife. One of them was a carrier for a recessive genetic mutation. As time went on and inbreeding occured because of the small population more and more children were born with the genetic disorder.
Go extinct.
Why is DNA the weakest evidence of evolution?
Actually, it is the strongest evidence for evolution. Without one fossil we would know from the DNA evidence that evolution has occurred and is occurring. It is in the DNA of organisms that we see the strongest evidence for common ancestry. The products of those genes are sometimes highly conserved down the ages. Ribosomes, the workbenches on which proteins are made, differ hardly at at between you and pets.
If there is not reproductive fitness conveyed by a variant trait, then natural selection has nothing to select and nothing to promote into the populational gene pool.
How are alleles frequencies related to gene pools?
The frequency of the allele represents the percentage of that allele in the gene pool
similar structures arising independently in different lineages, convergent evolution among different lineages, and adaptation by different lineages to the same selective pressures
FAD stands for Free Air Delivery which indicates the compressors capacity, it normally described in: L/Sec, m3/min or cfm. Quote: The capacity of a compressor is the full rated volume of flow of gas compressed and delivered under conditions of total temperature, total pressure, and composition prevailing at the compressor inlet. It sometimes means actual flow rate, rather than rated volume of flow. This is also called free air delivery (FAD) i.e. air at atmospheric conditions at any specific location. This term does not mean air delivered under identical or standard conditions because the altitude, barometer, and temperature may vary at different localities and at different times.
Do organisms evolve slowly over time and can two different organisms have a common ancestor?
Yes they evolve slowly over time and a panda and raccoon have common ancestors.
Why is evolution reffered to as a theory?
I don't exactly know why evolutionists refer to it as a theory, but I do know this.
A theory is an explanation or model based on observation, experimentation, and reasoning.
According to the definition of a theory, evolution is not a theory. Evolution cannot be based on observation. No one was here to observe it. So evolution should be classified as a hypothesis not a theory. It is only a guess as to how things came about.
