Micro is small scale changes within a species, often in observable time periods. Macro is actually what most people think of when evolution is discussed, large scale changes that separate species, made over long time scales.
And there's plenty of evidence for both. Micro has been observed directly in current species, while the fossil record through dating and transitional fossils has provided evidence of macro.
And of course this is a very simplistic description of a much more complex picture.
So no, life won't fill in gaps here on earth, but it could possibly show trends of evolution that might be independent of where the life is. Kind of like a second experiment...
And there's plenty of evidence for both. Micro has been observed directly in current species, while the fossil record through dating and transitional fossils has provided evidence of macro.
And of course this is a very simplistic description of a much more complex picture.
So no, life won't fill in gaps here on earth, but it could possibly show trends of evolution that might be independent of where the life is. Kind of like a second experiment...