- A Live in the same habitat with little shared evolutionary history according to standard texts
- B Belong to unrelated families that resemble each other by chance in most observed cases
- C Are two different common names applied to the same organism under typical physiological conditions
- D Share a more recent common ancestor with each other than with any other species
Correct answer: D. Share a more recent common ancestor with each other than with any other species
Explanation: Sister species share an immediate common ancestor exclusive of other species, making them each other's closest relatives on a phylogenetic tree.
Concept context
Biodiversity, taxonomy, binomial nomenclature, the taxonomic hierarchy, and taxonomic aids like herbaria and botanical gardens. The foundational first chapter of NCERT Biology.