1 23/1
2006
ZOOLOGY
Paper 1
Tillie.' 1I0/ll's J I il}rt.rlllwlIl .11u,.;"s 300

INSTRUCTIONS
CUlldrdatcs should ottClIlpt all the questIOns III Parts B t!ley tu choose unly three questIOns in Purr D. Till' /lumber of lliUl'hs cOlT/ed hy eoeh question IS indicated at the end of the qucstioll.
Ansu't'rs be Il'I"lt/i'1I in ElIgllsh.
TIllS paper hos !CHlr parts
A 20 markE-:
n 100
C !JO marks
D gO

ol/utll'r! III qUC8tlO)) urc mr!u'(ftcd III

23/1 i
PART A
cucl! questioll ahout 50 words. Each questiori carries;)
1. Write short notes on the following

I'1orphological adapt.ations in Helminth parasites
Ib) Ilodifications of soft organs in tho flight birds



Imprinting with a suitable example
IdJ Green gland and itt; function in Palaemon



23/1

PART B
eacll (jIU'SIIO!I III (llmltt 100 Il'ords. Each questIOn carnes IllOrks.
2. l<xpJain t.he of Coelom and Iletamcrism.
8. Cunsidering-Halistemma as an example, bring out the concept of pulymorphislll in Siphunophura.
4. Tract' tlw of aortic arches from Amphibians upto mammals.
5.
Dilll'l'l-'ntia1e capture fisheries from culture fisheries and bricOy explain tllC' different stC'ps iIl'olved ll1 pond culture practices,

6.
,lake" survey of the producers and their adaptive relationshlp in the Ic'ntlc fresh-water hallltaU.

7.
Explall1 the general organization of flightless bIrds.

8.
With reference lu Porifel'an,s' skeleton, briefly write about meaIllng, formation and types of spicules.


H. lJnl'ide 8 chart with labelled illustrations in aid of identificatio!l of plllSOOOUS snakes from snakes.
10, /low of nitroJ_!"en is complicated. multi-directional and each slage i.e; regulated by a -"'pecitic type uf organi.sm." SuustanLwtl' the statemenl With I'l,j"erence to mtrogt'!1 cyril:
11. E.plain standard dC'Yia1iull as a superior tool over ot.her or '-dJ"latiun Add a 011 its prupllrlips.
I

PARTe
i
su'Pr each qu('slwlJ III about 150 words. Each questioN carries
15 morhs.

12.
Explain the general organization of Echinoderms and add a note on how the,V act as an evolutionary link to Hemichurdatc;,;,

13.
1leotioo the meaning and essence of Roeial life in insects and discu.ss social organization in Termites.

14.
Define a population. List the group properties of a population and explain four of them.

15.
Discuss the role or biological clocks in guiding the rh,ythmicity animal behaviour.

16.
Explain the general organization of Diponi. Mention their primitive and unique characters. Give reason for Romer describing Dipnoi as undes of Amphibia.

17.
Describe the circulator)' system of Unio.


23/1

PARTD
Answer any three of the following questions, each in about 300 words. Each question carries 30 marks.
IH. With reference to Plasmodium, describe the cycle of Ross.
19.
Give a comprehensive picture of causes, effects and prevention of water pollution. Add a note on the management of polluted water.

20.
What is adaptive radiation? Explain it with reference to extant reptiles.

21.
Discuss the origin of Amphibia.

22.
With labelled figures, describe retrogressive metamorphosis in Ascidian.


I
2006
ZOOLOGY
Paper 2
. Hours I [Jlaxwwm Marhs .'lOU

INSTRUCTIONS
Cund/(jutcs should attempt all the questions B C they hellY to r/IOOSI' three In Part D. TJu' tllIlIIlJd ollllurhs curned hy each IS at till' enei of IjUt'stlOli.
i111S1Cl'I"c, must he lJ..'f'itten i/l English.
TillS !UIS lour jJarts
A 20 marks
n lUll mark"
C gil mark:;
D gil marks

,farks' tu each are inrliruted ill ]Jarl.

23/2 PART A A.nsu'er each question in about 50 words. Each question C(ll'rip8 .5 l!Iarl,'3.

1. Write short notes on the following

Oxidative phosphorylation


Hamburger's phenomenon


Singer and Nicolson's model of plasma membrane fdl Cytoplasmic inheritance in Paramecium


"
13 23/2 PART B llJxlO=lOO questIOn in about 100 u'ords. EOl'h question carries 10 marhs.
2. .lorgan discovered that linkage is an exception to Mendel's principle of mdependent assortment. ,Justify.
:3. Bring out the concept of neurosecretion from the study of Pituitary and Adrenal.
4.
Extra-embryonic membranes are an adaptation In the development of hirds, Explain.

5.
Write a brief account of types of colouration and their significance III :tl1lmals.

6.
the variolls events involved in replication of DNA.

7.
Briefly (xplain the blOsynthesis of cholesterol.

8.
Vhat is aneuploidy'? Explain any three aneuplOld conditions in l-luman".

9.
ExpL'Iin hormonal control of metamorphosis in Insects.


10. the observed in Prophasc-I of
11. Outline the role of B{vmphocytes and T-lymphocytes as specific body


73/2 PART C

ew,h question in about ISO words. Hoeh quef,twn carries
15 nwrks.

L2. What are fossils? Explain their typos and dating.
13.
thl, histological classification of placenta 1I1 mammals and describe any two If them citing suitable examples.

14.
Give a comprehensive picture of the structure, types with examples and hiological significance of proteins.

15.
Explain the types of chromosomal basis of sex determination in animals

16.
What is mutation List the dItferenL mUlag'enH': agents and explml1 CIB of identifkation of mutations.

17.
ExpJalll the physiology of coagulatiun of blood.


51 23/2 PARTD
Answer any three of the following questions, each in about 300 words. Each question carries 30 marks.
18.
What is a nerve impulse? How is it propagated? Explain the physiology of axonal transmission of nerve impulse.

19.
Make an overview of positive and negative aspects of eugenics.

20.
Discuss the various events involved in the mechanism of fertilization.

21.
Explain the second step in the mechanism of protein synthesis In prokaryotes.

22.
Neo-Darwinism IS the synthetic product of Darwinism and Mendelism. Substantiate.