LivingMetal said:
But they are still birds. Was a frog really a fish, and did that "fish" matured into something else rather than a frog? And many insect are born as larve. And there are similarities in regards to DNA. That's doesn't mean I can sprout wings. |
Yes, by our defintion it was likely a fish that has the genetic composition to evolve into a frog. What you are talking about is a sudden, extreme mutation. It can happen, but usually mutations are minor and happen over time. There are plenty of species that we cannot define as land- or waterbased and that can be because they are in a transition between stages. Your argument would be the same in every stage of a evolution of a species since you don´t look at the bigger picture.
Look at it this way: when you look at grass on a meadow and just focus on one strain of grass, it´s really hard to see it grow in real time but we do know that it grows, right? If someone would say to you that you should prove that it grows because that person can´t see it, you would just say that the person could sit with you in front of this strain of grass for a couple of days and see the result occur. With evolution we are talking about sitting in the same spot, looking at one species for ten of thousands of years. That makes the challenge a bit more difficult =).
Cats and lions cant breed, are of different species but likely have the same ancestor. This happens for a very long time (likely millions of years) and is a good example of the same kind of creatures that have evolved in different directions.
