Banaras Hindu University %28BHU%29 2007 B.Sc Botany .part 3 - Question Paper

botany
full marks 75 hours three
1 .give the comparative account of r and k opted life history strategies.[marks 15]



2. describe the plant community. explain different concept related to plant community. [marks 15]



3. what is plant succession ? provide an account of different models explaining of plant succession..[marks 15]



4.enumerate the sources and types of air pollution define the effect of major air pollution on plants.[marks 15]

part b


5. write descriptive notes on any 2 of the subsequent .[marks seven 1/2]



(a)ecological niche



(b)effect of climax



(c) trend of species diversity


6.write descriptive notes on any 2 of the subsequent .[marks seven 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 2 of the subsequent .[marks seven 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 2 of the subsequent .[marks seven 1/2]

(a)autogenic and allogenic succession

(b) grazing and detritous food web


(c) J and S shaped population growth curve


9. short ans in one or two phrases [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

Earning:   Approval pending.