Answer :
Final answer:
A species is a group of organisms that can interbreed and produce fertile offspring. Reproductive isolation and shared characteristics play key roles in defining and differentiating species.
Explanation:
A species is a group of organisms that can interbreed and produce fertile offspring together in nature. The key aspect that differentiates one species from another is the ability to produce viable offspring through interbreeding. For example, all human beings belong to the same species, Homo sapiens, because they can potentially interbreed with each other.
The definition of a species is complex and can be based on shared characteristics like behavior, genetics, and morphology. Taxonomists often use morphological differences in morphology, physiology, or biochemistry to distinguish between species. Additionally, for a new species to form, some members must become reproductively isolated from the rest of the species.
Reproductive isolation plays a crucial role in the formation of new species. When individuals from the same species become geographically isolated and can no longer interbreed with others, a new species may evolve over time. This reproductive barrier leads to genetic differences accumulating between populations, eventually resulting in the formation of distinct species.
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