CSS Zoology Past Paper 2002
Paper-I
PART-2(Subjective) 80 Marks
Attempt ONLY FOUR Questions from PART-II. (20×4)
PART-II
SECTION-I
Q. No. 2
(a) Describe various modes of locomotion in Protozoa.
(b) Describe conjugation in Paramecium and its significance.
(c) Give the economic importance of sponges.
Q. No. 3
(a) Write down the economic importance of coral reefs.
(b) Describe the life history of liver fluke by giving suitable diagrams.
(c) Explain metamerism and its significance in Annelida.
Q. No. 4
(a) Give the diagnostic features of arthropods.
(b) Describe the adaptive modifications of the foot in gastropods.
(c) Give an account of the water vascular system in echinodermates.
SECTION-II
Q. No. 5
(a) Describe the various types of scales in fishes.
(b) Enumerate the functions of the skin and also tell the structures derived from it.
(c) Write briefly about the pouched mammals.
Q. No. 6
(a) Describe the mechanism of respiration in mammals.
(b) Give an account of dentition in mammals.
(c) Write about the economic importance of birds.
Q. No. 7
(a) Describe the structure and function of the mammalian kidney.
(b) Write about migration in birds.
(c) Stoics are useful creatures. Discuss.
Paper-II
PART-2(Subjective) 80 Marks
Attempt ONLY FOUR Questions from PART-II. (20×4)
PART-II
Q. No. 2
(a) Define polyploidy and explain its role in the origin of new species.
(b) Explain test cross and give its significance.
Q. No. 3
(a) Describe the structure and function of the plasma membrane.
(b) Explain the factors that affect the rate of enzyme action.
(c) Define inhibitors and give its types.
Q. No. 4
(a) Write what you know about the theory of natural selection. How does it differ from mutation theory?
(b) Briefly discuss the embryological evidence of animal evolution.
Q. No. 5
(a) Write about the nitrogen cycle in detail.
(b) Write short notes on the following:
- Greenhouse effect
- Parasitism
- Predation
Q. No. 6
(a) What is a synapse? How is a nerve impulse transmitted from one neuron to another?
(b) What is the feedback mechanism with respect to hormones? Explain with examples.
(c) Write about the transport of oxygen in man and mention the factors which affect the capacity of hemoglobin to combine with oxygen.
Q. No. 7
Write an essay on genetic engineering.
Q. No. 8
Write notes on the following:
- Chromosome map
- R-factors
- Mitochondria
- Food web