Assam University 2009 B.Sc Zoology TDC Part-II Honours --- Fifth - Question Paper

NTS-09/ ZOOH-5 /098

2009
ZOOLOGY (Honours)
Fifth Paper
(Environmental Biology, Organic Evolution and Adaptation, Biophysics, Animal Behavior and Economic Zoology)
TDC Part-II

Full Marks : 70
Pass Marks : 21

Time : three hours

The figure in the margin shows full marks for the ques.

ans all ques.

1. What is biomagnification? elaborate the agents for air pollution? define the impact of air pollution on environment and human health. Mention the technologies for abatement of air pollution. 2+5+4+4+5 = 20
Or

(a) Discuss niche concept. explain temperature as limiting factor in an ecosystem. 5+7 = 12
(b) Discuss predation and parasitism as negative interactions in the population. 4+4 = 8

2. (a) Write briefly on the synthetic theory of evolution. 7.5
(b) define the embryological evidences of Organic Evolution. 7.5

Or
(a) What is convergent evolution? explain different adaptations of mammals to aquatic and
Volant life. 2+4+4 = 10
(b) Write a short note on natural selection. 5

3. What is Diffusion? How does it differ from Osmosis? discuss the role of pH and buffers in
different physiological system. 2+2+6 = 10
Or

Write brief notes on: 2.5 x four =10
(a) Henderson-Hasselbalch formula (b) Adsorption
(c) Surface tension (d) Biophysics

4. describe ‘altruism’. Distinguish ranging from innate and studied behaviour. Add a brief note on
reflexes. 1+4+5 = 10
Or
What is physogastry? define the social behaviour in termites. 2+8 = 10

5. (a) What is deep litter system? Mention the kinds of housing and other equipments needed
for poultry cultivation. 5+5 = 10
(b) explain the management of nursery pond. 5

Or
(a) What is Sericulture? How Eri and Muga silkworms differ from every other? define the
life cycle of Muga silkworm. 1+2+7 = 10
(b) Add a brief note on economic importance of beekeeping. 5

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Earning:   Approval pending.