CSS Zoology Past Paper 2009
Paper-I
PART-2(Subjective) 80 Marks
Attempt ONLY FOUR Questions from PART-II by selecting TWO questions from EACH
SECTION. (20×4)
PART-II
SECTION-I
Q. No. 2
(a) Write an essay on “Protozoa and diseases.”
(b) What are coral reefs? Give an account of the various forms of coral reefs.
(c) Coelenterates show some resemblances with Porifera. Discuss briefly.
Q. No. 3
(a) Give an account of the canal system in sponges.
(b) What is adaptation? Briefly discuss parasitic adaptations in platyhelminthes.
(c) Define the following terms:
(i) Polymorphism
(ii) Metamerism
(iii) Parasitism
(iv) Osmoregulation
Q. No. 4
(a) Describe the water vascular system of Echinodermata.
(b) Give an account of human diseases caused by nematodes.
(c) What is conjugation? Briefly discuss its significance.
Q. No. 5
Write short notes on:
(i) Torsion in gastropods
(ii) Flame cells
(iii) Spicules
(iv) Coelom
SECTION-II
Q. No. 6
(a) Write an essay on “Flight adaptations of birds.”
(b) What is cleavage? Describe different types of cleavages, with examples, found in chordata.
(c) What are the functions of blood?
Q. No. 7
(a) What is placenta? Give classification of placenta in mammals according to the mode of implantation.
(b) Describe various types of heart found in vertebrates.
(c) Give the classification of vertebrate eggs according to the quantity of yolk they contain.
Q. No. 8
Write short notes on:
(i) Uriniferous tubule of a mammal
(ii) Neuron
(iii) Functions of the skin
(iv) Structure of the bone
Paper-II
PART-2(Subjective) 80 Marks
Attempt ONLY FOUR Questions from PART-II. (20×4)
PART-II
Q. No. 2
(a) Give an account of the mechanisms by which the living cell is believed to synthesize proteins.
(b) Explain how carbon dioxide is transported by the blood.
Q. No. 3
(a) Describe the structure and functions of cell membrane.
(b) How is the nerve impulse generated and conducted.
Q. No. 4
(a) Describe prophase-I of meiosis in detail with the help of labeled diagrams.
(b) Give an account of digestion of food in mammals.
Q. No. 5
(a) Describe the structure and functions of Endoplasmic reticulum.
(b) What is haemoglobin? How does it carry oxygen in the blood? What happens when carbon monoxide combines with haemoglobin?
(c) Differentiate between pinocytosis and phagocytosis.
Q. No. 6
(a) Give an account of Mendel’s law of segregation with an example.
(b) What is a vestigial organ? The presence of vestigial organs is taken as evidence of evolution. Discuss.
Q. No. 7
(a) What are biogeochemical cycles? Describe the carbon cycle in detail.
(b) Give an account of Lamarck’s theory of evolution.
Q. No. 8
Write short notes on:
(i) Natural Selection
(ii) Mutation
(iii) Hormones
(iv) Chromosomal aberration