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3/30/2015 6:30:36 PM
5
Wouldn't macro-evolution just be a large series of micro-evolutions? Large evolutions take thousands to millions of years to get to that point and often happen little by little.
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Could you elaborate a little more on your meaning? :)
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Well I've never really heard the term macro-ecolution but seeing as how macro refers to big or large scale I'm guessing you're refering to something drastic like fish becomes lizard. Something like that happening in a generation or two would be impposible under normal circumstances. But over the course of hundreds of thousands of years this could happen through little changes from one generation to the next. Say tou have a fish species who lives in a lake, but the lake is running low on food. But in the very shallow waters, there is plenty of food to eat. So out of nessecity to survive some fish try to go after the food. The only ones who don't get stuck and die in the low waters are the ones with longer fins that let them crawl around. Those surviving fish them mate to make other fish with long fins while those with the shorter fins eventually run out of food and die off. Now add up thousands of similar situations such as some of the fish with different gills are able to survive on land for short time periods. Out of those decedents some develop stronger fins to move, which eventually become limbs, then the ones with harder skin are less likely to be killed bu predators. Then those who are born with teeth out of some mutation are able to go to different areas with harder foods etc... These were all small evolutions but when added up the end result is that a fish eventually evoled into a lizard.
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Ok that makes sense
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If you look at it, that's basically what a ring species proves. That as a specific creature (let's say salamanders, since that's one well-documented example) moves about, and adapts to different environments, at some point, it stops being able to recognize another deviation as the same creature or produce offspring. Thus, it becomes a new species.
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He means the only difference between micro and macro evolution is time. It would be absurd to believe that if little changes occur in small amounts of time, they don't accumulate into larger changes over huge amounts of time. Time is the only difference.
