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?

analogous structures
homologous structures
vestigial structures
mutated structures

Explanation:

Analogous structures are traits with similar functions but different evolutionary origins (not inherited from a common ancestor). The saber teeth of Thylacosmilus and Smilodon serve the same purpose but come from unrelated ancestors, fitting this definition. Homologous structures share ancestry, vestigial structures are non-functional remnants, and mutated structures are random genetic changes—none match the given scenario.

Answer:

analogous structures