W.B.C.S Main 2005 Optional Question Paper Zoology.

W.B.C.S Main 2005 Optional Question Paper Zoology paper 1

Group – A.Continue Reading W.B.C.S Main 2005 Optional Question Paper Zoology.

1.  Write scientific names of human malaria.  What is its infective stage to man ?  Describe the asexual life history stages of any one of them with labelled sketch.      2+1+12+5

2.  What is a larva ?   Describe different types of larva. Describe different types of larvae found in arthropods.       2+14+4

3.  What are the characteristics of Amphibia ?  Where from amphibian arose ?  Classify the existing amphibians with Indian examples.       3+2+12+3

4.   What are the characteristics of marsupials ?  Name one marsupial outside Australian continetn.   Write the affinities and systematic position of Marsupialia.      3+2+11+4

5.  Write brief note on any four of the following :

(a)  Metagenesis in Obelia

(b)  Larval stages in digenetic trematodes

(c)  Present day concept of amoeboid locomotion.

(d)  Biological status of Sphenodon sp.

(e)  Difference between poisonous and nonpoisonous snake

(f)  Torsion in mullusca

(g)  Regeneration

(h)  Social behaviour in honey bee       5×4

Group—B

Answer any two questions.

6.  What is ecological niche ?   What is Autecology ?   Describe the interrelationship in trophic level in an ecosystem with example.  What is pyramid of biomass ?    Give names of green hourse gasses. 2+1+9+4+4

7.  What is certral tendency ?   How can you calculate the mean median and mode ?  What is Null hypothesis ?   What is variability ?   Give examples.      2+6+6+6

8.  Write scientific names of four silkworm moths. Describe different diseases of silkworm moths.     4+16

9.  Write notes on any four of the following :

(a)  Biological rhythm

(b)  Altruism

(c)  Migratory behaviour of birds

(d)  r and k selection

(e)  Social organisation of termite

(f)  Students t-test      5×4

W.B.C.S Main 2005 Optional Question Paper Zoology paper 2

Group – A

(Answer any three questions.)

1. (a) Draw and describe the structure of fluid-mosaic model of Plasmalemma. What is fluid in it ? 13+2

(b) Distinguish between Ribosome and Lysosome. 5

2. What is fate map ? State the significance of fate map. Describe the process of gastrulation in chick. 2+2+16

3. Give the actual chemical name and structure of urea. What do you mean by ammonotelic, ureotelic and uricotelic animals. Describe the chemical cycle with structures by which urea is produced in mammals. 2+2+6+10

4. Comment on (any four) : 5×4

(a) Cytoplasmic inheritance

(b) Sex-limited trait

(c) Cloning

(d) Colour-blindness

(e) PCR

5. Distinguish between : 4×5

(a) Holotype and paratype

(b) Colouration and mimicry

(c) Poikilothermic and homeothermic

(d) Classification and identification

(e) Spermatogenesis and oogenesis

6. (a) What is replication ? Briefly describe the semiconservative mothod of replication. 2+8

(b) Give a short account of Down’s syndrome. 10

7. Write a brief account on the evolution of Horse. 20

Group—B

Answer any two questions.

8. (a) What is Glycogenesis ? Describe in details the different steps of Glycolysis. 2+10

(b) State the function of Vit-C and Vit-K. 4+4

9. What is osmoregulation ? Describe the process of osmoregulation in some fresh water and marine animals. 2+9+9

10. Write notes on (any four) : 5×4

(a) Types of vertebrate eggs

(b) Function of placenta

(c) Biological species concept

(d) Polyspermy

(e) Neo-Darwinism

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