Where did speed dating originate
One common mistake is believing that species can be arranged on an evolutionary ladder from bacteria through "lower" animals, to "higher" animals and, finally, up to man.
Mistakes permeate popular science expositions of evolutionary biology.
Individual organisms do not evolve, they retain the same genes throughout their life.
When a population is evolving, the ratio of different genetic types is changing -- each individual organism within a population does not change.
An organism's phenotype is determined by its genes and its environment.
Most changes due to environment are fairly subtle, for example size differences.
The increase in relative abundance of the dark type was due to natural selection.
The late eighteen hundreds was the time of England's industrial revolution.
The English moth, Biston betularia, is a frequently cited example of observed evolution. The frequency of the dark morph increased in the years following.Soot from factories darkened the birch trees the moths landed on.Against a sooty background, birds could see the lighter colored moths better and ate more of them.Evolution can occur without morphological change; and morphological change can occur without evolution.Humans are larger now than in the recent past, a result of better diet and medicine.