W.B.C.S Main 2002 Optional Question Paper Zoology.

W.B.C.S Main 2002 Optional Question Paper Zoology paper 1

Group – A.Continue Reading W.B.C.S Main 2002 Optional Question Paper Zoology.

(Answer any three questions.)

1.  Distinguish between protostomia and deuterostomia.  Classify living echinoderms with characters and citing examples.     5+10+5

2.  Describe the structural organization of the locorriotory organs of protozoans. States their modes of functioning.     12+8

3.  State the distinguishing features of poisonous and non-poisonous snakes.  Name the components of poison apparatus of snake with their structural organization.  Give a note on mcchaaism of snake biting.     6+9+5

4.  (a)  What do you mean by missing link ?  Why is Archaeopteryx considered as missing link ?     2+8

(b)  Describe the structure of a typical feather.  Give a note on different types of feathers of birds.    6+4

5.  Write short notes on any four of the following :

(a)  Parapodia of Nereis

(b)  Respiratory pigments

(c)  Tube feet of starfish

(d)  Sphenodon

(e)  Air sacs of pigeon

(f)  Ruminant stomach.     4×5

Group-B

Answer any two questions.

6.  What do you mean by ecosphere ?  Name the major components of ecosystem. Give a note on different biotic components of on ecosystem and their significance.     2+3+15

7.  What do you mean by induced breeding ?  Describes in detail the procedure invoked in induced breeding of corps State the principle and advantages of composite fish culture.    2+12+6

8.  Write short notes on any four of the following :

(a)  Ecological Pyramid

(b)  Greenhouse effect

(c)  t-test

(d)  Circadian rythm

(e)  Social organization of ants

(f)  Correlation coefficient.     4×5

W.B.C.S Main 2002 Optional Question Paper Zoology paper 2

Group – A

(Answer any four questions.)

1.  Describe the ultrastructure and functions of mitochondria.    12+4

2.  What is endotherms ?  Give idea on the heat production in the body.  Compare ectothermy and endothcrmy.    3+9+4

3.  What is speciatibn ?  Describe the process of speciation, in brief, taking example of any bistope ?     3+13

4.  Describe the sequential events in the process of fertilization in brief.  What is its significance?    12+4

5.  How does ammonia form in the body ?  Give idea in brief the metabolism of ammonia with reference to ureotelic, ammonotelic and uricotelic organisms.     2+4+5+5

6.  (a)  Give an account of the steps of initiation of DNA replication in an eukaryote. Name the enzymes involved in each step. What is the base sequence characteristic of initiation region ?      3+2+2

(b)  Give idea about the PCR.     4

(c)  In recombinant DNA studies, what is the role of restriction endo-nuclease, terminal transferase, vectors, host cells, and calcium chloride.     5

7.  Write notes on any four of the following ;

(a) Foetal membrane in chick

(b) Type concept

(c) Mimicry

(d) Hardy-Weinberg equilibrium

(e) DNA as a genetic material

(f) Mechanism of image formation in ommatidium.    4×4

GROUP-A

Answer any four questions,

8.  What are difference between phenetic and cladistic concept in systematies ?  What are the weaknesses of the purely phenetic method ?      8+8

9.  What is osmoregulation ?  Describe the process of osmoregulation in protozoans and annclidas.    6+10

10.  Distinguish between sex determination and sez differentiation. Give idea on the sex determination methods in Drosophilasp.    4+12

Our own publications are available at our webstore (click here).

For Guidance of WBCS (Exe.) Etc. Preliminary , Main Exam and Interview, Study Mat, Mock Test, Guided by WBCS Gr A Officers , Online and Classroom, Call 9674493673, or mail us at – mailus@wbcsmadeeasy.in
Visit our you tube channel WBCSMadeEasy™ You tube Channel
Please subscribe here to get all future updates on this post/page/category/website