Ecology and Conservation — DU B.Sc. (Hons.) Botany Previous Year Question Papers

2. Attempt four questions in all. 4. All parts of a question should be answered together. (a) Match the following 1x5=5 i Luxmeter a) Total water in soil ii Nepenthes khasiana Uppermost warmer layer of water body iii Holard c) Predation iv Food web d) Instrument used to measure light intensity Epilimnion e) Interlocked food chain (b) Define the following (Any five) terms 1x5 = 5 i Edge effect ii Sciophytes iii Alluvial soil iv Pedon Hydrosere vi Parasitism vii Capillary water (c) Give one word (Any five) for the following 1x5=5 i. The ability of organisms for self-regulation, which enables them towards to hanging environment ii. The functional level of an organism in any food chain iii Process of successful establishment of species in a new area. iv Small organism which feeds on the dead bodies of other organisms. V Fully decomposed organic matter in soil. vi Zone of transition between different types of communities. vii A recently evolved spp. restricted to a particular geographic region. 2. Differentiate between (Any three 5 x 3 = 15 (a) Mor and mull humus (b) k and r selection (d) Gaseous and sedimentary cycle (e) Analytical characters and synthetic characters 3. Write short notes on (Any three) (b) Shelford's law of Tolerance (c) Ecological pyramids (d) Different types of water in soil (e) Light as an ecological factor (a) What is ecological succession? Explain xerosere with the help of suitable diagrams. (b) What is energy flow in an ecosystem? Explain the Y-shaped energy flor nodel and discuss the main features of this mode (a) What are the different strategies for conservation.? Explain On-farm conservation strategies with example. (b) What are biotic interactions? Discuss various types of biotic interactions. 8