B.Sc. Hons Zoology Sem-5 CC-11 Calcutta University Exam Question Paper

2020
ZOOLOGY — HONOURS
Paper: CC-11
(Ecology)
Full Marks : 50
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.

1. Answer any fifteen questions of the following :
   (a) What do you mean by biodiversity hotspots? 2
   (b) Define solar flux and solar constant. 1+1
   (c) What do you mean by the term ‘biotic potential’? 2
   (d) Define keystone species with example. 1+1
   (e) What is species richness? 2
   (f) What do you mean by ‘ecesis’? 2
   (g) Mention the names and locations of any two tiger reserves in West Bengal. 1+1
   (h) What is ecological equivalent? Give one example. 1+1
   (i) What is edge effect? 2
   (j) What do you mean by ‘turnover rate’ in ecosystem? 2
   (k) What do you mean by closed community? 2
   (l) Give two features of k-selected species. 1+1
   (m) Write the primary role of decomposers in ecology. 2
   (n) What do you mean by functional food web in ecosystem? 2
   (o) What do you mean by ‘Agenda 21’? 2
   (p) Define survivorship curves. 2
   (q) What is protocooperation? 2
   (r) Write definition of ‘Sanctuary’ and ‘National Park’. 1+1
   (s) Write full form of NPP and GPP. 1+1
   (t) What do you mean by Climax Community? 2
   (u) What is a flagship species? Cite example. 1+1
   (v) Define ex-situ conservation with suitable example. 1+1
   (w) Name two nitrogen fixing bacteria. 1+1
   (x) What do you mean by ‘potential natality’? 2
   (y) What is synecology? 2
2. Answer any four questions of the following :
   (a) What is ‘ecological pyramid’? Energy flow pyramid is always true pyramid. — Explain. 2+3
   (b) (i) What is Lotka–Volterra competition model?
   (ii) What are the three basis assumptions of the Lotka–Volterra model? 3+2
   (c) Define community. Explain vertical stratification of a community with example. What is pupulation
   dispersion? 2+2+1
   (d) Elucidate the phases of S-shaped population growth form citing an animal population model. 5
   (e) Explain why are India considered as one of the megadiversity countries. State the importance
   of megadiversity countries. 3+2
   (f) Draw a Y-shaped energy flow model and describe its components to show flow of energy
   in ecosystem. 5
   (g) Explain the richness and abundance components of Shanon–Weiner species diversity index. 2½+2½
   (h) Write short notes on the following (any two) : 2½×2
   (i) Competitive co-existance
   (ii) Gause’s principle
   (iii) Red databook
   (iv) Mutualism
   (v) Ecotype.

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