Microevolutionary changes seem too unimportant to account for such transitions as the origin of dinosaurs or the radiation of land plants, but sure as hell they're not. Microevolution happens on a small time scale from one generation to the next. Now add up such small changes over millions of years, they translate into evolution on the big scale, in other words for nimrods---->macroevolution
The four basic evolutionary mechanisms, mutation, migration, genetic drift, and natural selection can produce major evolutionary change if given enough time. Accumulating small changes for 3.8 billion years is more than enough time for these simple evolutionary processes to produce this huge history, just like it produced Grand Canyon & Great Lakes & Great Deserts & Mt Everest.
And the great thing is, we know it explains what we see around us so well we just keep on making new discovery after the next, only nimrods with tiny micro agendas would deny it.
Do we see anything random on the large scale? No, the universe leans towards order from the big bang onwards. |
