Organismal & Evolutionary Biology — DU B.Sc. (Hons.) Environmental Science Previous Year Question Papers

(b) Describe two key types of beneficial mutations. Name of the Papcr Organismal and EvolutionarY Biology (DSCC- 14) 2. Answer any four questions. erz Delhi- Differentiate between any three of the following: 3 (a) Describe the emergence of tissues and organ systems during evolution. ( 10) (a) Gene Flow and Genetic Drift (b) How does population size influence genetic drift? (5) (b) Hardy-Weinberg Equilibrium and Evolutionary (a) Outline the major molecular tools used in evolutionary classification. (8) (c) Photosynthesis and Aerobic Metabolism in (b) Explain the origin and significance of new genes through exon shuffling. (7) (d) Allopatric and Sympatric Speciation Write short notes on any three of the following: (a) What is co-evolution? Provide two examples of mutual evolutionary influence. ( 10) (a) Miller's Experiment (b) Describe the significance of isolating mechanisms in evolution. (5) (b) Role of Developmental Biology in Evolution (c) Adaptive Significance of Multicellularity (a) Trace the progression of evolutionary thought from Lamarck and Darwin to the Modern (d) Wallace's Line and Biogeographic Patterns