Question

Thylacosmilus is a marsupial, and Smilodon is a mammal. Thylacosmilus and Smilodon both have saber teeth, but they do not share an ancestor that had saber teeth. What are saber teeth for these organisms?

Answer 1

The answer is Analogous structures.

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Answer 2

The saber teeth represents a convergent evolution. This type of evolution is present when two organisms do not share a common ancestor having a specific trait however having a history that has selected for the same trait to evolve independently.