Time Allowed: three Hours maximum Marks: 200
Candidates should attempt Questions 1 and 5 which are
compulsory and any THREE of the remaining questions, selecting at least ONE
question form each Section.
SECTION –A
1.
Write short notes on any FOUR of the following
in about 150 words each:-
(a)
Peroxisomes
(b)
Amphidiploids
(c)
Polygenic inheritance
(d)
B- chromosomes
(e)
Tests of significance
2.
(a) Describe briefly various structural changes
in chromosomes.
(b) Explain the different
types of aneuploidy
3.
(a) Give a concise account of cytoplasmic
inheritance
(b) Explain the biochemical and molecular basis
of mutation.
4.
(a) What is heterosis? Explain the various
theories of heterosis.
(b) Explain hybridization as a method of plant
breeding.
SECTION –B
5. Write short notes on any FOUR of the
following in about 150 words each:-
(a) Water
potential
(b) Senescence
(c) Endemism
(d) Acid
rain
(e) Testing
for seed viability
6. (a)
Explain C₄ photosynthetic carbon pathway.
(b) Explain the biochemical
changes that occur in photo system I and photo system II of photosynthesis.
7.
(a) What are Auxins? Explain the physiological
effects of Auxins.
(b) Explain the uses of plant
growth substances in Agriculture and Horticulture.
8.
(a) Explain the concepts and dynamics of
Community.
(b) Describe the
characteristics of different categories of Aquatic ecosystem.
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