This section contains 2,401 words (approx. 9 pages at 300 words per page) |
Differing Rates of Evolutionary Change and Common Misconceptions
Author: Billy Smith
EVOLUTIONARY time scales are difficult to comprehend from a human perspective; resultantly, anthropocentric conceptions of time have perverted evolutionary theory. Evolution is seen by laymen as a generational process - a process pondering the question: if the offspring of sexual organisms are always different from their parents, why does speciation only take place over many thousands of generations? Speciation - even adaptation for that matter - cannot be viewed in this microcosmic scope. For the purpose of this paper, speciation will be defined as the elimination of any "potentiality for interbreeding among members" of non-conspecific groups (Daly & Wilson, p70). Adaptation arises by the "trial and error" of novel traits - traits that tend to be neutral or deleterious - in a relatively stable environment (Harter, 1999). Since neither neutral, nor deleterious traits provide an organism with greater fitness, those traits will likely...
This section contains 2,401 words (approx. 9 pages at 300 words per page) |