1999
ZOOLOGY
Paper 1
I" JIu.nnlum ;Harhs 300


INSTRUCTIONS
is printed 60th in English C!nd in KaunodCl.
must be iL'nUen rn the medium spf'o/icd or KC!lInada) in the Admission Tzclcd Issued to

must he stoted cleCtrly on the cocer the hook in the space pl'ou/,ded this [llirposc. No Ii ill be giL'en (or the ulIsu)(:rs lLIitten 1/2 mcdw thnn tltet specij!"ed in the AdnuSSlOJl Trcket.
Ccndiu'otes should attempt questions 1 unci 5 Ol"f'
and uny three of the remazning questiOns. nl ler..!.s! one qltestion from CCich Section.
lillis/nre yo:.u withc:uituole dingrcn!is

All questlons carry equal marks.


.


23/1 (2
SECTION A
1. Wntc concise accounts of any three of the following in about 200 V'ords each
(aj NutritlOl1 in Protuzoa
(b.i Retrogressive metamorphosis

Beneficial insects


Origm of Amphibw and affinities of Apodans


2. Discuss Par:asitlc Protozoans in relation to human health,
3. Write an on the evolution of Elasmobranchs with a note on their adaptive radiation.
4. Give an account on the flight adaptations in birds with a comment on
Ratltae.

13) 23/1









....


"







{Turn over

23/1 (4 I
SECTION B
5. Vnte brief accounts of any three of the following in about 200 yords each I Ecological succession with a sUItable example Ib) Biologic-a! clock and genetic regulations
Types of sampling methods
rdi Induced breeding

6.
Describe the sources of various air pollutants and theif harmful effecr.3 on human health.

7.
vVnte an essay on the life cycles of any two beneficial insects with a note on theIr economic importance.

8.
Obtain regressIOn equations from the folloving data


x 6 2104 8
y
9115 87



11



I
II " e



i

r I


r"" c c

" n"
ce

" " n
"J:


(" u
" i
1 "I " C1.
n" "
J
" tiL
rii

" "l

u tl
lj


C
I
d CI<t
I
(L "I.


·C
,.1

(Ie " -Ll d m

IL
" " ttJ
2t
10,
JJ .f" ""

h" 11


"
CI

"


"
"
"
u" u­


te

"
0
"i
.f",


C" f;.


I
"
I
U




1999



[iHC:Xillii/ll! iun




"1" I the
" ,."i·I"


Tic-hd





n,r
il! b
t,io

Condit/ates shu{lid 1 olul 0 Ichich ure

II h:i.Jry, nd or rt.'1/Hll17in{{ qile",Uo/ls, S,'il'i.irilR at leu,of




r

Ai! questions carry cquuZ lIJorhs.




23/2 (2I
SECTION A
1. Distinguish hetween any three of the following (each answer must be wntten in about 200 words) (ell Klinefelter's syndrome and Sickle cell anaemia {bJ Allopatric and Sympatric speciation
Ie) m-RNA and t-RNA
(dj Ribosomes and Polysomes

2.
Explai!1 thultiple allele inheritance in Man.

3.
Vnte an account of the various geological eras and their significance.

4.
Vnte notes on the following:


Polytene chromosomes


Isolation mechanisms In animals


Insular fauna
(dJ Cytoplasmic inheritance











c.



-c.










i 23/2
5. Distinguish


Poly-unsaturated acids and Saturated fatty acids (bi Bohr ,effect and Hamburger effect


• 'Adrenal cortex and Adrenal medulla
(d)'-Organogenesis and Carcinogenesis



6.
Describe the mechanism of skeletal muscle contraction with a note on energetics.

7.
Vrite an account of modern nomenclature and classification of enzymes.

8.
Write notes on the following:


Cyclic AMP in hormone action


Neurotransmitters and nervous disorders


Beta oxidation-of fatty acids




• (dJ Placental hormones
"


5 I 23/2
o':llil"li B
..
i:1M;aa mt;lo o::Io""o;tiM"" ,10030 200 illoKIi""

0230 ""omtinJco<


oSoe13o'"


6. ;50 "On ;:lo;,o;tiro0c3M M /1.i0;

7. (Enzyme8) N.l ill 'iii <ill"" lifo) 0;1 .
8. ilIiMo;j)KIi"'l, ;50°30
lo
(Neurotransmitters) 0;0

, .


M