Assam University 2007 B.Sc Zoology TDC Part-II Honours --- Fifth - Question Paper

NTS-07/ ZOOH-5 /059

2007
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. Distinguish ranging from Autecology and Synecology. define how energy flows through ecosystem. Add a note on Shelford’s legal regulations of tolerance with suitable illustrations. 4+8+8=20
OR
What do you mean by population interactions? define different kinds of positive and
negative population interactions obtained in animals with suitable examples. 2+18=20

2. What do you mean by Volant adaptations? explain how structural changes helping
achieving Volant adaptation. Add a note on hovering and soaring. 2+9+4=15
OR
List a few clues which provide us proof of organic evolution. define the morphological
evidences of organic evolution. 2+13=15

3. What is osmotic pressure? define how the principles of osmotic pressure are helpful in
explaining life phenomena. Relate your discussion with special emphasis on exosmosis
and enosmosis. 24+4 =10
OR
Write short notes on the subsequent (any two) : five x two = 10
(a) Buffer
(b) Adsorption
(c) Surface tension

What do you mean by mean by instinctive behaviour? elaborate its types? discuss
nesting behaviour in birds. 2+2+6 = 10
OR

Write short notes on the subsequent ( any two) : five x two = 10
(a) Reflex action
(b) Taxes
(c) Social behaviour in any insect

5. elaborate the common kinds of breeds generally used in poultry farming? Mention the
different kinds of equipments and housing needed for poultry cultivation. Add brief
notes on any 2 diseases of chickens. 4+7+4 = 15
OR
ans the following: five + three +7 = 15
(a) define modern practice of ‘Bee-keeping’.
(b) Write the chemical composition of honey.
(c) Describe the life cycle of Eri-silk moth with suitable diagram.

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Earning:   Approval pending.