What do the similarities between Humans crocodiles bats whales and birds limb bones suggest?

The similarities in limb bones among humans, crocodiles, bats, whales, and birds suggest a common evolutionary ancestor. These homologous structures indicate that despite their different functions and adaptations—such as flying, swimming, or walking—these species have evolved from a shared lineage. This phenomenon, known as divergent evolution, highlights how environmental pressures can shape the anatomy of organisms while retaining underlying similarities. It reflects the principles of evolutionary Biology and the interconnectedness of life on Earth.