Assam University 2009 B.Sc Zoology TDC Part-I Honours --- Second - Question Paper

NTS-09/ ZOOH-2 /026

2009
ZOOLOGY (Honours)
Second Paper
(Non-chordates)
TDC Part-I (New Course)

Full Marks : 70
Pass Marks : 21

Time : three hours

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

ans 5 questions, taking 1 from every Unit

Unit – I

1. Write 6 salient features of Phylum Protozoa. discuss the process of locomotion in Protozoa with suitable diagrams. 6+6+1 = 14

2. Write briefly on any 2 of the subsequent : seven x two = 14
(a) Canal system of Porifera with reference to sycon
(b) Classification of Porifera
(c) Reproduction in Paramecium
(d) Structure and reproduction in Euglena

Unit- II

3. describe coral reef. elaborate the various kinds of coral reefs? How are coral reef formed? 2+4+8 = 14

4. Write short notes on (any two) : seven x two = 14
(a) Reproduction in Obelia with suitable diagrams
(b) Polymorphism in Siphonophora
(c) Structure of Ctenophora with diagrams
(d) Affinities of Ctenophora

Unit- III

5. What do you mean by sexual dimorphism in Schistosoma? elaborate the different species infecting man? define the life history and pathogenecity of any Schistosoma species with necessary diagrams. 2+2+6+4 = 14

6. define the general features of Nemathelminthes. Write 4 unique parasitic characters of Nemathelminthes. explain the pathogenecity of Wuchereria bancrofti. 6+4+4 = 14
Or
Write a few anatomical peculiarities of leech. define the nervous and urinogenital system of leech. 4+10 = 14

Unit- IV

7. (a) define the salient features of phylum Arthropoda.
(b) define the respiratory system in Prawn. 7+7 = 14

8. Write short notes on any 2 : seven x two = 14

(a) Four larval forms of Crustacea
(b) Affinities of Onychophora.
(c) Sense organs of Prawn
(d) Social life in Termites

Unit- V

9. provide an account of water vascular system of starfish with suitable diagrams. What is the significance of water vascular system? 7+2+5 = 14

10. What is torsion and detorsion? define the mechanism of torsion in a gastropod with suitable diagrams. 2+2+6+4 = 14

Earning:   Approval pending.