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Evolution implies that organisms will always evolve towards greater perfection.

Convergent evolution results in organisms that are closely related but look different due to different environments.

A scientific theory, like evolution, 

The Linnaean classification system uses binomial nomenclature to name species.

Homologous structures in different species suggest

Which term best describes the process where one species benefits at the expense of another?

Phylogenetic trees show the evolutionary relationships among various species.

Comparative anatomy, like homologous structures, supports the idea of common descent.

Taxonomy is solely based on physical characteristics of organisms.

What is the difference between allopatric and sympatric speciation?