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Posted Date: 07 Jul 2008 Posted By: richa Member Level: Silver
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2007 Banaras Hindu University B.Sc b.sc.part 3 botany Question paper
botany
full marks 75 hours 3
1 .give the comparative account of r and k selected life history strategies.[marks 15]
2. define the plant community. discuss various concept related to plant community. [marks 15]
3. what is plant succession ? give an account of various models explaining of plant succession..[marks 15]
4.enumerate the sources and kinds of air pollution describe the effect of major air pollution on plants.[marks 15]
section b
5. write descriptive notes on any two of the following .[marks 7 1/2]
(a)ecological niche
(b)effect of climax
(c) pattern of species diversity
6.write descriptive notes on any two of the following .[marks 7 1/2]
(a)cause and consequences of eutrophication
(b)soil pollution and its impact on plants
(c) factor influencing toxicity
7.write descriptive notes on any two of the following .[marks 7 1/2]
(a)dose response relationship
(b)analytic character of plant community
(b)measurement of primary productivity in terrestrial ecosystem
8.write descriptive notes on any two of the following .[marks 7 1/2]
(a)autogenic and allogenic succession
(b) grazing and detritous food web
(c) J and S shaped population growth curve
9. short answer in 1 or 2 sentences [marks 10* 11/2]
(a)biological magnification
(b)LD50
(c)aerosol
(d)toxicants
(e)acid rain
(f) random sampling
(g)community net productivity
(h) natality
(i)synthetic community character
(j)chrono sequences succession
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