3. Both descendants share a backbone, radius and ulna, lungs, and structures for producing milk.
4. Paleontologists make diagrams like this to show connections to a common ancestor. They are trying to show that, through evolution, a single species adapted to various environments and eventually grew so different from each other that they became new species.
What are the paleontologist?
A paleontologist can conclude from the plant fossil is, that it must be a land plant under the classification of either gymnosperm or angiosperm.
Thus, these are the answer.
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