W.B.C.S Main 2006 Optional Question Paper Zoology.

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W.B.C.S Main 2006 Optional Question Paper Zoology paper 1

Group – A.Continue Reading W.B.C.S Main 2006 Optional Question Paper Zoology.

(Answer any three questions.)

1.  What is meant by ‘Meta genesis’ ?   Explain it with diagrams and references to the life cycle, of Obelia. Comment on how a Medua is derived from polyp.      2+3+10+5

2   Write in brief the anatomical peculiarities of Limulus.  Discuss the affinities of Limulus.     10+10

3.  What is venous heart ?   Draw a venous heart of a teleost fish.  Describe the method of purification and mode of circulation of blood in ‘teleost fish.’     3+5+6+6

4.  What is meant by double respiration ?   Draw a neat diagram and describe double respiration with reference to the respiratory system of birds.     5+5+10

5.  Write short notes on any four of the following :-     5×4

(a)  Modes of locomotion in Paramaecium.

(b)  Distinguishing characters of Phylum Cnidaria.

(c)  Flame Cells,

(d)  Scolex of Taenia Solium,

(e)  Trachea of Cockroach,

(f)  Rectrices and remiges.

Group – B

(Answer any two questions.)

6. What is lac ?  Write its composition.  Name the strains of lac crop with their characters.  Write on natural and artificial methods of inoculation.  What are the uses of lac ?      2+2+4+8+4

7.  What is “Community dominance” ?  Give an account of the ecological niches and state how niche differes from habitat.  What is ecological succession ?  Give an account of the ecological succession in a pond.      3+3+3+2+9

8.  Write short notes on any four of the following :-      5+4

(a)  Food chain and food web.

(b)  Precautions to be taken during the cultivation of silk,

(c)  Diseases of honey bees and their symptoms,

(d)  Exotic fish culture,

(e)  Organo phosphate insecticides.

W.B.C.S Main 2006 Optional Question Paper Zoology paper 2

Group – A

(Answer any three questions.)

1. (a)  Explain GERL region,

(b)  Malfunctioning of Lysosome often results in pathological disorders in human. Explain,

(c)  State the functions of Peroxisome,

(d)  Discuss the structural details of mitochondria.      4+3+3+10

2. (a)  Explain spermiogenesis with suitable diagram,

(b)  Discuss the principal events of fertilization.     10+10

3. (a)  What is epistasis ?  Explain recessive epistasis with suitable example,

(b)  Define linkage.  Explain incomplete linkage with suitable example.    2+8+2+8

4.  Write notes on :      4×5 = 20

(a)  Dosage compensation,

(b)  Sexduction.

(c)  Sex limited trait.

(d)  Topoisomerase.

(e)  Turner syndrome.

5.  (a)  Distinguish between micro evolution and macro evolution:  Describe the evolutionary changes in the phylogeny of horse,

(b)  Explain punctuated equilibrium     4+12+4

Group – B

(Answer any two questions.)

6.  Write notes on : (any five)     4×5 = 20

(a)  Sibling species,

(b)  Holotype,

(c)  Phenon,

(d)  Rasscnkreis,

(e)  Agamospecies,

(f)  Properties of taxa name,

(g) Natural classification.

7.  (a)  Explain counter current multiplier mechanism in terms of urine formation. What is meant by facultative water absorption ?

(b)  Explain tie molecular basis of muscle contraction.     8+2+10

8.  (a)  What is meant by saponification number of flat ?

(b)  Write on the properties of cholesterol,

(c)  State the general properties of simple sugar,

(d)  What is meant by coagulation and denaturation of protein.    3+5+6+3+3

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