Lamarck thought that traits organisms acquired during their lifetime would be passed on to offspring. He believed that traits were determined by use or disuse. However, acquired traits cannot be passed on to offspring; only traits determined by DNA can
Natural selection
Random processes are not part of the theory of evolution by natural selection.
Charles Darwin
Natural selection is most closely related to Darwin's theory of evolution.
According to evolutionary theory, natural selection is the principle that directs evolution.
Nice? The theory of evolution by natural selection is the best and best supported explanation for the fact of evolution we have, but it just is and a word such as " nice " would not always fit theory. Google Ichneumon wasp to see that natural selection is not always " nice. "
The Grants have been able to provide clear evidence for natural selection and supported Darwin's theory. The hypothesis was that natural selection can occur many times in a lifetime.
It does not mater what anyone thinks about the theory of evolution by natural selection. The theory of evolution by natural selection is the best explanation we have for much of the observed and observable fact of evolution. The theory is internally consistent with the fact of evolution, it is supported by myriad lines of converging evidence and it generates testable predictions in the form of scientific hypothesis. The opinion of no one is needed by the theory of evolution by natural selection and educated people have come to accept the theory.
In Darwin's theory, natural selection plays the key role. Organisms vary through random mutations--slight changes from their parents. The environment determines which are most likely to survive. In Lamarck's theory, changes in phenotype are inherited. This is now known to be (largely) incorrect.
which is not part of darwins theory of natural selction
Evolution is both theory and fact. Moreover, the fundamental theses of the theory (common descent, natural selection) are so well supported by fact that they might as well be called fact.
Natural selection
Natural Selection
Random processes are not part of the theory of evolution by natural selection.
It is no longer Darwin's theory, as Darwin has been dead about 130 years. There are no credible alternatives to the modern theory of evolution by natural selection. So, the differences is; the theory of evolution by natural selection is supported by myriad lines of converging evidence and explains the natural phenomenon that is evolution very well. The " conflicting theories " have no evidence supporting them and explain nothing.
The theory of evolution by natural selection is no longer just Darwin's theory because the theory has been modified and added to somewhat in the last 150 years +. Still, the theory is supported by massive amounts of converging evidence, is internally consistent, has the ability to generated testable hypotheses and, doing what a scientific theory is supposed to do, explains much about the fact of evolution. The theory of evolution by natural selection is the bedrock of biology.
Darwin's theory of evolution.