Yes, natural selection is always occurring.
Evolution, of course. Evolution can happen without natural selection in some cases; drift, flow. Generally though, natural selection causes evolution and then, by definition, would come first.
inorganic ;)
It is not a matter of agreement, it is a matter of accepting the overwhelming evidences in support of the theory of evolution by natural selection.
Evolution by natural selection can be described as a scientific theory. In scientific terminology, a theory is a well-substantiated explanation of some aspect of the natural world that is based on a body of evidence and has withstood rigorous testing and scrutiny. While it has not been proven false, it remains open to refinement and further testing as new evidence emerges.
Evolution is the observed effect of natural selection acting on reproductive variation. Natural selection is a continuous process. The rate at which natural selection changes allele frequencies depends on the effect of the allele in the world. If the allele considered provides a significant reproductive benefit when compared to rival alleles, it will spread throughout the population gene pool much faster than the rival alleles.
Discovered Natural Selection
Darwin
the orgin of species by means of natural selection
hypothesis
yeah its occurring in Darfur
there are some sick freaks in the world
Notincluding human intervention. Natural selection.
Evolution, of course. Evolution can happen without natural selection in some cases; drift, flow. Generally though, natural selection causes evolution and then, by definition, would come first.
inorganic ;)
It could prevent some polution
inorganic
Natural selection doesn't directly occur in the genes or alleles. Natural selection occurs in the "real world", in which the organisms with the desirable traits are living, while the organisms with undesireable traits are dying or otherwise failing to reproduce. Nature is "selecting" these animals with useful traits, which survive to reproduce and pass on these genes. The genes are what give animals the certain traits they need in order to survive. The individual alleles give the variation within a certain trait. For example, within the gene for fur color, there can be an allele for white, and an an allele for brown. The bunny that gets the brown allele will probably suvive in the wild. (Unless the environment is snow!)