Which statement provides the best argument form why bird and butterfly wings evolved to have similar function but differ in structure.
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1 point
This is an example of embryological structures.
This is an example of vestigial structures.
This is an example of analogous structures.
This is an example of homologous structures.
This is an example of analogous structures.
The statement "This is an example of analogous structures" provides the best argument for why bird and butterfly wings evolved to have similar function but differ in structure.
To determine the statement that provides the best argument form for why bird and butterfly wings evolved to have similar functions but differ in structure, we need to understand the different forms of structural relationships.
1. Embryological structures: This refers to structures that are similar during the embryonic stage of development but may differ in their mature forms. It does not specifically explain the evolution of bird and butterfly wings, so this statement can be eliminated.
2. Vestigial structures: These are remnants of structures that were functional in evolutionary ancestors but have lost their original function in descendants. Since both bird and butterfly wings have a definite purpose (flight), they cannot be considered vestigial structures, so this statement is not the best argument.
3. Analogous structures: These are structures in different species that have similar functions but have originated independently and do not share a common evolutionary origin. This statement suggests that bird and butterfly wings evolved to have similar functions independently, making them analogous structures. This is the best argument form for why bird and butterfly wings have similar functions but differ in structure.
4. Homologous structures: These are structures derived from a common ancestor but may have different functions in descendant species. Bird and butterfly wings do not share a common evolutionary origin, so they are not considered homologous structures.
Based on the above explanations, the statement "This is an example of analogous structures" provides the best argument form for why bird and butterfly wings evolved to have similar function but differ in structure.