Match each core Lamarckian evolutionary postulate or related historical criticism on the left with its accurate biological mechanism or empirical evaluation on the right.
- Principle of Use and DisuseDevelopmental hypertrophy or atrophy of specific organs occurring directly in response to functional environmental demands during an organism's lifespan.
- Inheritance of Acquired CharacteristicsHypothesized transmission of somatogenic physiological changes developed during life directly to offspring generations.
- Internal Vital ImpulseProposed innate drive causing simple organisms to continuously originate from non-living matter and progress toward greater anatomical complexity.
- Weismann's Germplasm BarrierExperimental refutation showing that physical alterations in somatic tissues do not modify genetic material in reproductive cells.
Answer
Principle of Use and Disuse pairs with organ hypertrophy or atrophy from functional demand; Inheritance of Acquired Characteristics pairs with direct transmission of somatic changes to offspring; Internal Vital Impulse pairs with the proposed innate drive for complexity from non-living matter; Weismann's Germplasm Barrier pairs with the experimental refutation showing somatic changes do not affect germ line genetics.
Each concept correctly aligns with its historical and biological definition: Use and Disuse describes organ changes within a lifespan; Inheritance of Acquired Characteristics describes the proposed transfer of those changes to offspring; Internal Vital Impulse accounts for the drive toward complexity; and Weismann's Germplasm Barrier provides the classical empirical refutation distinguishing germline inheritance from somatic changes.
Step-by-Step Solution
Key Concept
Lamarckian Postulates and Historical Refutation