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
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