WEST BENGAL CIVIL SERVICE
EXAMINATION - 2002
Zoology Paper-I
Time Allowed-3 Hours Full Marks-100
Furnish only essential illustrations where necessary.
Group - A
(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. 4x5
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. 4x5
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