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
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The correct option is a) analogous structures

Explanation:

In evolutionary studies, analogous structures can be described as similar structures which are present in different species not having a common ancestor. These structures have a similar structure but not a common origin.

Other options, like option B, is not true because homologous structures are structures present in different organisms, which may not perform the same functions but have a common origin. For example, forelimbs of bats, humans and birds.