Evolutionary Ecology — DU B. Sc. Life Science (Zoology) Previous Year Question Papers

DSC, Evolutionary Ecology B.Sc. (P) Life Sciences V, NEP - UGCF 2. Attempt four questions 1n all. Question no. t 18 1. (a) Define the following : (iii) Species richness (iv) Sewall Wright Effect (b) Distinguish between the following : (8) (ii) Allopatric speciation and sympatric speciation (iii) Exponential and Logistic Growth (iv) Alpha and Gamma diversity ( c) Fill in the blanks : (3) (i) Darwin's finches are a group of species found primarily on the ______ Islands. (ii) Well defined groups interrelated in the way they exploit the environment are known as (iii) A species having a disproportionate impact on the community relative to its abundance is ref erred to as a e regulation of a population by density dependent factors. (8) (b) Give an account of dispersion patterns in populations. (4) ( c) What is a fecundity table? Explain with the help of an example. (3) 3. (a) Describe the different types of natural selection with suitable examples. (9) (b) What type of adaptation allows desert animals to survive in extremely hot climates? (6) 4. (a) Discuss the different modes of speciation with suitable examples. (9) (b) Differentiate between r-selected and k-selected species. (6) (b) How does climate change affect macroecological patterns? (7) 6. Write short notes on any three of the following : (a) Adaptive radiation (b) Host-parasite interactions (c) Escape and radiate coevolution (d) Post-mating Isolating mechanisms (e) Survivorship curves