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Pune University - SY BSc (Sem - I) ENVIRONMENTAL SCIENCE - I, April 2010

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Total No. of Questions : 4] P285 [Total No. of Pages : 2 [3717] - 128 S.Y. B.Sc. ENVIRONMENTAL SCIENCE ENV 201 : Ecology & Ecosystem (New Syllabus) (Paper - I) (Sem. - I) Time : 2 Hours] Instructions to the candidates: 1) All questions are compulsory. 2) Draw neat & labelled diagram wherever necessary. 3) Figures to the right indicate full marks. [Max. Marks : 40 Q1) Attempt the following in 1-2 lines each : a) Define : Ecological niche. b) What is Primary Productivity? c) Define the term : Biome ecology. d) Give the difference between inter & intra specific competition. e) What are biogeochemical cycles? f) Name the bacterias which help in denitrification. g) What is meant by trophic structure? h) Give 2 examples each of biotic & abiotic limiting factors. i) What is Hydrosere? j) [10] Give any 2 significance of food chain. Q2) Write short notes on Any Two of the following each in 8-10 lines : a) Explain carbon cycle with diagram. b) What is Ecological Spectrum? c) [10] Explain Grassland Ecosystem with respect to its type. P.T.O. Q3) Answer Any Two of the following each in 8-10 lines : a) Explain various stages of atmospheric evolution. b) Discuss the process of ecological succession. c) [10] Explain the zonation in marine ecosystem. Q4) Answer Any One of the following in 20-22 lines : [10] a) What are Ecological Pyramids? Explain its type. b) Explain Ecosystem characteristic with respect to structural & functional attributes. vvvv [3717]-128 2

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Additional Info : S.Y. B.Sc. Environmental Science (Semister - I), ENV - 201 : Ecology and Ecosystem - I (Paper - I) (New Course), Pune University
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