Originally posted by: Throckmorton
Originally posted by: RapidSnail
Originally posted by: RapidSnail
Elementary question:
I've been puzzled by the concept of vertical evolution. I know microevolution has been observed and is a fact, but from what can science make the leap to drastic morphological adaption? I know it takes places with small changes over time (Ma's & Ga's), but if it's never been seen (and I don't mean on a microscopic or intra-species level, a.k.a microevolution). Since we can't stick around that long, is the assumption founded in an acceptance of Darwin's theory based on what makes the best sense currently? We either came from a common template or a common ancestor, and science follows the common ancestor theory because that's what has been agreed upon as the best explanation for diversity, right?
I don't know what you mean by vertical evolution, but google "speciation", "darwin finches", and "biogeography"
Vertical evolution = macroevolution
I understand what speciation is and I've heard of Darwin's Finches and the peppered moths. Perhaps you didn't understand my phrasiology, but that's what I meant by "(and I don't mean on a microscopic or intra-species level, a.k.a microevolution)." I'm satisfied with the evidence for small-scall evolution as represented by the terms you mentioned for me to google. I have no problems accepting microevolution (and I continue to distinguish from macroevolution for a reason, despite the only differences being time) as absolute fact because I can see the experimentation. (Similar to how I won't deny the volumetric shape of the earth or our heliocentric orbit due to actual visual evidence.)
My source of confusion arises from the proposition that microevolution + time = macroevolution. In other words, given a starting point (which starting point we shall assume as being axiomatic as well as providing the basic ingredients of life) and many eons, there will be a progression from "simple" organisms to "complex" organisms (relatively compared). Of course, due to constraints involving lifespan and the fact that human history, as well as scientific advancement, have only just begun (with respect to the scale of existence of our universe to human existence, according to modern dating) it is impossible to observe first-hand the long-term effects of mutations and the subsequent changes they would invoke. Which begs the question, what the hell is information and how do we know it can be gained (as opposed to lost, maintained, or modified) from mutations in such a way as to promote beneficial morphological adaption over long periods if that information did not exist in the genetic code before such processes started?
And what is the medium for transmission of information between an organism and its environment, and how does the organism "know" when it needs to evolve (or is that incorrect)? If an organism which spends all of its time on land experiences a drastic environmental change such that it now spends 90% of its time in water, what mechanism of interaction initiates the adaption process? Do sensory organs recognize increased contact time with an unstable, liquid substance which, in turn, causes a "panic" (of death) which starts cellular mutations in order to combat an extinction threat? How do these organisms know how to respond to stresses? Information is transfered from
something, so where does the compatibility between an organism and external information come from? In other words, how does the organism know how to interpret the information to initiate the evolution of new parts that provide it with compatibility? For example, the organism above might start to evolve its feet into flippers. If this organism never experienced living time in water, how would it, or whatever's "in charge," know that flippers are beneficial to swimming? (As if there was a predetermined response to that particular stress situation, despite never experiencing it.)
(ugh, I'm just a mess of questions right now )