What is an example of variation among species?

The concept of variation among species refers to the differences that can be observed between distinct species as they adapt to their environments and fulfill different ecological roles. In this context, the example that illustrates variation among species is when comparing the anatomical structures and adaptations of different groups.

Birds and fish are fundamentally different species, each adapted to their specific habitats. Birds possess wings that enable flight and are adapted for aerial life, while fish possess fins for swimming in an aquatic environment. This structural difference is a clear representation of how various species have evolved distinct features that suit their survival needs in vastly different ecosystems.

Other examples provided—such as hair colors in humans or variations in height within a single plant species—reflect variation within a species rather than between different species. Similarly, differences in feather patterns among birds also indicate variation within a species group rather than showcasing the distinctions between entirely separate species. Thus, the comparison of wings and fins effectively highlights the broader concept of variation across different species.