LTAWACS Posted May 27, 2009 Share Posted May 27, 2009 On the idea of evolution being a gradual process - it is and it isn't. It can occur gradually in some instances, and it can occur abruptly. Most researchers in evolution believe that it is a mixture of gradual and abrupt changes over time. Look up "punctuated equillibrium" and "quantum evolution" to get an idea for just a few of the models for evolution. Classic Darwinian gradualism has been left behind long ago.On the idea of some evolutionary tracks being vertical in nature, as McLeroy claims, "evolutionary track" is an astronomical term, not a biological term, so that should clue you into McLeroy's level of understanding. Secondly, assuming that when McLeroy is talking about speciation when he talks about "vertical evolution"; the various mechanisms of speciation are well-understood: eg: allopatric, parapatric, peripatric (which have all been observed), sympatric.No, we did not evolve from monkeys. We and monkeys both evolved from a common ancestor. However, it is possible for one species to evolve from another species and both species to remain extant. If McLeroy is asserting that this can't happen, then this exposes his ignorance at a basic level of the body of evolutionary theory he is attacking. A particular population of a species can remain genetically stable if its environment remains genetically stable. Genetic changes which differ from the traits that have already adapted it to that environment provide no advantage, even provide a disadvantage, so are not passed on, and that population of that species remains the same. Now if a group migrates from that population, it may find itself in a different environment that favors different traits, and disfavors original traits. This could cause that migrated population to change so much it becomes a new species.Science has a far better understanding of the mechanisms of evolution than it does the mechanisms of gravity, yet we don't teach high school physics students the "alternative theory" that the Hand of God pushes us down and keeps us from flying off the earth.There is a story of Gallileo being called before the Inquisition, who demanded he recant his theory that the earth revolves around the sun - or else. Gallileo did recant his theory, but then supposedly looked down at the earth and muttered "yet it moves." No amount of denial by backward people like McLeroy is going to change the FACT that evolution is real, has been observed, and is quite well understood compared to other natural phenomena. It's just sad that in a state that already has one of the worst educational performance records in the country, the chairman of our board of education is actively trying to further weaken the quality of the education our students get.Very well said. Quote Link to comment Share on other sites More sharing options...
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