__ 1. Modern whales have very small pelvic bones that serve no useful function This is an example of a(n) __ in which an ancestral feature is retained but serves no function for the organism. A. analogous structure B. vestigial structure C. homologous structure __ 2. Similarities in bone structure between a human hand and whale fin is an example of a(n) __ A. analogous structure B. vestigial structure C. homologous structure __ 3. The wings of a dragonfly and the wings of a bird serve the same purpose, but have no similarities in structure they do not share a recent common ancestor. This is an example of __ A. analogous structure B. vestigial structure C. homologous structure

1. **B. vestigial structure**. Vestigial structures are remnants of features that served a purpose in an organism's ancestors but are no longer functional in the modern organism. The small pelvic bones in whales are a classic example, suggesting whales descended from ancestors that walked on land.<br /><br />2. **C. homologous structure**. Homologous structures are similar in structure, suggesting a common ancestor, even if they now serve different functions. The bone structure similarities between a human hand and a whale fin indicate a shared evolutionary history.<br /><br />3. **A. analogous structure**. Analogous structures serve the same function but evolved independently in different lineages. They do not share a recent common ancestor or underlying structural similarity. The wings of a dragonfly (insect) and a bird are a prime example of convergent evolution leading to analogous structures.<br />