Approaches to Classify Organisms Taxonomy, the traditional way to classify organisms, examines organisms' physical structure. This is because animals or plants of the same species share certain similar physical forms in general. However, studies have found its counterexamples and have shown that taxonomy is fundamentally flawed. Another method is to classify organisms according to sexual reproductivr ability. Although it is practical for describing complex life forms, this approach still has limitations; it disregards organisms with asexual reproduction and is not able to explain when new species are created from mating of two differeny species. This is a summary of an essay. I would really appreciate any recommendation or modification to this writing.