Yazata
Active Member
Statement defining evolution, comments from experts here on evolution, please.
I'm not an expert on evolution, but I was a biological science undergraduate. I'm probably best described as an interested/educated layman at this point.
See what you think of the following statement since I'm looking up concept of evolution. So, first off,
"What is evolution?
In biology, evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection. The theory of evolution is based on the idea that all species are related and gradually change over time."
Let's start there. To recap, the theory of evolution considers all species to be related and gradually change over time. All species.
What is evolution?.
Yes, I'd agree with it, with several caveats.
First, 'evolution' means 'change over time'. That's the bottom line. Since Darwin and Wallace that's been understood as occurring through natural selection. I personally think that's correct, but it isn't the same idea as change over time. Evolution in the sense of change over time might conceivably have a different mechanism and still be evolution.
Second, 'species' is a controverted concept in biology and the the philosophy of biology. There's a whole literature on how 'species' should be defined. It's pretty clear that 'species' means something very different in microbiology than it means in mammology.
Species concept - Wikipedia