Question

The similarities of dolphin fins and bird wings may indicate _______.

shared body structures

homologous structures

similar early development

a common ancestor

Answer 1

The similarities of dolphin fins and bird wings may indicate **homologous structures**. This term refers to body parts that share a similar origin or structure due to common ancestry, even if they serve different functions in different species. In this case, both fins and wings have evolved from a similar ancestral structure, despite their different adaptations for swimming and flying, respectively.