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What is the primary biological feature of 'Species', the most basic unit of taxonomic hierarchy?

Answer and explanation

Correct answer: Its members can successfully interbreed to produce fertile offspring

Answer: A. In the biological species concept, a species is a group of natural populations whose members can interbreed under suitable conditions and produce fertile offspring. Fertility matters because offspring that cannot reproduce do not maintain gene flow between the populations. Geographic location is not the defining feature, so B is wrong: one species may occur in many regions or countries. Body colour can vary within a species because of genes, age, sex, or environment, so C is wrong. Every organism eventually dies, making D plainly incorrect. The statement is a basic school-level definition; it has limits for asexual organisms, fossils, and some special cases, but it is the best option here. Memory cue: species means reproductive continuity, not identical appearance or location.

Related tags

SpeciesTaxonomic HierarchyReproductive IsolationTaxonomyBinomial NomenclatureTaxonomy Binomial NomenclatureThe Living WorldBiologyClass 11 Mcq

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