Which term is a homologous structure shared by all organisms in a group?

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Multiple Choice

Which term is a homologous structure shared by all organisms in a group?

Explanation:
Shared derived characteristics are traits that originate in the common ancestor of a group and are passed down to all its members. These homologous features reveal evolutionary relationships and help define a clade, since they are unique to that lineage. That makes this term the best fit for describing a structure or feature that all organisms in the group share due to common ancestry. For example, hair is a derived trait that defines mammals. The other terms describe naming, classification, or a general concept, not a specific inherited feature linking members of a group.

Shared derived characteristics are traits that originate in the common ancestor of a group and are passed down to all its members. These homologous features reveal evolutionary relationships and help define a clade, since they are unique to that lineage. That makes this term the best fit for describing a structure or feature that all organisms in the group share due to common ancestry. For example, hair is a derived trait that defines mammals. The other terms describe naming, classification, or a general concept, not a specific inherited feature linking members of a group.

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