The relevant concept is that of the ecological niche. The daschund is adapted to the niche of being a pet for humans, and it would be very badly adapted for the niche of being a predator in the wild.
natural selection and common descent
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.
Due to genes and mutations, organisms show variation within a species. Changes in the environment can put a selective pressure on the species - certain mutations may be more beneficial, therefore more individuals with that mutation will exist, as they survive and breed. This process is called Natural Selection.
Although we may not be able to say who first defined evolution as the means by which new species arise, we do know that early pioneers of evolution theories include Jean-Baptiste Pierre Antoine de Monet, Geoffroy Saint-Hilaire and Lamarck. Charles Darwin (1809-1892) was not the first to study evolution, but he was the first to recognise the role of natural selection in evolution. He defined the process by which evolution occurs as being natural selection, in his Theory of Evolution by Natural Selection.
The theory of evolution by natural selection explains how adaptive change may lead to speciation,\. As any good scientific theory it explains much but not everything. I seriously doubt, except in an ultimate sense, that you can explain why Gothic literature is now popular with evolutionary theory.
No, there are no other theories but the theory of evolution by natural selection that explain so much about evolution.
How it can change in response to its enviroment
There are several theories to explain evolution, though evolution itself is not a theory. Perhaps the best known is Darwin's theory through natural selection.
natural selection and common descent
The theory of evolution by natural selection. It explains evolution; the change in allele frequency over time in a population of organisms. Why organisms change over time in differing environments.
There is no " theory of evolution " as evolution is a fact. The theory is; the theory of evolution by natural selection and explains much about the fact of evolution. Charles Robert Darwin and Alfred Russel Wallace come up with the theory of evolution by natural selection, though natural selection is a phrase coined by Darwin.
It is the most consistent, and perhaps the best, theory put forward to explain the fact of evolution.
Evolution, the change in allele frequency over time in a population of organisms, is explained by science. Natural selection, mutation, genetic drift and gene flow explain just about all of the basics of evolution.
What is the mechanism that causes evolution. Both knew evolution occurred and occurs but did not know how or why. Lamark's " desire to evolve " and " acquired characteristics " failed to explain evolution. Darwin's theory of evolution by natural selection was the better explanation.
explain in brief the evolution of the computer
To explain the species problem, " that mystery of mysteries " which was the natural history problem of the day. From his observations and experiments Darwin proposed his theory of evolution by natural selection, which provided a mechanism for the observed fact of evolution.
What are the differences between creation and the theory of evolution