Assam University 2008 B.Sc Zoology TDC Part-II Honours --- Fifth - Question Paper

NTS-08/ ZOOH-5 /056

2008
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.


1. ans the subsequent :
(a) describe Ecosystem. 2
(b) Add a brief note on ecological niche. 5
(c) define briefly the differences ranging from food chain and food web. 3
(d) define Liebig’s legal regulations of minimum with suitable illustrations. 5
(e) provide a description of any lentic ecosystem you have learned. 5
Or
(a) define briefly the influence of light and temperature on animals. 4+4=8
(b) Write a note on water pollution and its effect on human health. Add a note on the
measures to control water pollution. 8+4 = 12

2. define the Lamarck’s Theory of ‘Inheritance of Acquired Characters”. Add a note on neo-
Lamarckism. 10+5 = 15

Or
(a) explain the physical changes that help in achieving aquatic adaptation in animals.
7.5
(b) define the embryological evidences of organic evolution. 7.5
3. (a) Briefly explain how the principles of osmosis and diffusion are helpful in explaining
life phenomenon. 5
(b) explain briefly how the different ranges of pH influence enzymatic activities in the
digestion of food particles in mammals. 5
Or
Write briefly on the following: 3+4+3 = 10
(a) Viscosity (b) Handerson-Hassbalch formula
(c) Indicators

4. define the different kinds of taxes with suitable examples. Add a brief note on Reflexes.
7+3 = 10
Or
Write short notes on the following: 5+5 = 10
(a) Learning behaviour (b) Tropism

5 describe Lac culture. define the life history of lac insect. Mention the disease of lac
insect and their control. Write the economic importance of lac. 2+6+4+3 = 15
Or
(a) Briefly define the various kinds of ponds that occur commonly in a scientic fish
farm. 5
(b) Add a brief note on economic importance of silk. four
(c) Write on the cultivable carps in India. 2
(d) Briefly write on any 2 diseases of chickens. 4

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Earning:   Approval pending.