It was based on fossil evidence
They can't. Once a species becomes extinct, it has reached the end of the line. It no longer exists, so therefore produces no more offspring. Thus, the theory that living species of today are descended from extinct species from long ago is untenable.
This is more on a basis of opinion and belief. There are some that believe that dinosaurs are still living among us and have never gone extinct, and there are others that believe that dinosaurs have been extinct for the past 65 million years. Added: Yes, they are called birds!
Extinct - no more, not living Living- a lot, alive
no. they are not extinct. they are still living in madagascar.
you can't have an extinct animal living. It can be endangered or close to being extinct, but not extinct.
when there are no living members of a species the species is said to be "extinct".
You obviously hadn't noticed that living things have not become extinct. There are still plenty of them about.
Tigers are not extinct. They are still living creatures on earth.
The are examples of stromatolites still living. They are not extinct.
Hippopotamus are not extinct - they are alive and well and living in Africa
When no living member of a species exists, the species is considered extinct. Extinction occurs when a species has completely disappeared from the Earth, with no individuals remaining alive anywhere in the world.
yes