Which paradigm views the organism as the sum of many evolved parts and is best understood through reductionist analysis?

• A. Macroevolution
• B. Punctuated equilibrium
• C. Kin selection
• D. Reductionism

Answer: (D)

Reductionism is the approach that treats an organism as the sum of its parts—genes, cells, tissues, and their interactions—and argues that understanding these components reveals how the whole functions and evolves. This stance uses reductionist analysis, breaking a complex system into simpler parts and studying each part to explain overall biology. The other options don’t focus on this method: macroevolution looks at large-scale evolutionary patterns across species, punctuated equilibrium describes a tempo model of evolutionary change, and kin selection explains social behavior through relatedness and fitness rather than a methodological emphasis on analyzing parts.