CSS Zoology Past Paper 2010
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) “A protozoan cell is not equal to a cell of a multicellular organism”. Discuss the statement.
(b) “Sponges are at the colonial level of cellular organization”. Justify the statement.
Q. No. 3
(a) How will you differentiate between corals and coral reefs? How are different types of coral reefs formed? (3+7)
(b) Discuss parasite adaptation with special reference to platyhelminthes.
Q. No. 4
(a) Define metameric segmentation. Explain with reference to Annelida.
(b) Discuss metamorphosis with reference to insects.
Q. No. 5 Write short notes on:
(i) Echinoderm affinity
(ii) Shell in Mollusca
(iii) Importance of Nematodes
(iv) Polymorphism in coelenterates
SECTION-II
Q. No. 6
(a) Discuss Amphioxus as a complete chordate.
(b) “Hemichordates have both chordate and non-chordate character”. Justify.
Q. No. 7
(a) Discuss evolution of the heart in different chordate groups.
(b) Give a brief account of embryonic membranes.
Q. No. 8
(a) Define biological migration. Discuss the phenomenon with reference to birds.
(b) “Birds are said to be glorified reptiles”. Justify the statement.
Q. No. 9 Write short notes on:
(a) Scales in Fishes
(b) Exoskeleton in mammals
(c) Feathers in Birds
(d) Desert adaptations in Reptiles
Paper-II
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) Describe the structure, chemical composition, and function of the Endoplasmic reticulum.
(b) Define the membrane system. What are the main members of this system in a cell?
Q. No. 3
(a) Draw neat diagrams to show different stages of meiosis in a cell, where the diploid number of chromosomes is 6.
(b) Describe the phenomenon of transcription.
Q. No. 4
(a) Discuss the mechanism of transport of carbon dioxide from tissue to lungs.
(b) How are nerve impulses passed through the nervous network?
Q. No. 5
(a) Develop a list of the hormones secreted by the pituitary gland and indicate their target organs and effects.
(b) Define excretion. What are the rationales for adapting to different excretory substances in different animal groups?
Q. No. 6
(a) Define Epistasis. Describe six basic types of epistatic reactions.
(b) Define sex-linkage. Explain the phenomenon with one example.
SECTION-II
Q. No. 7
(a) Write an essay on the possible origin of life.
(b) “Fossils provide some important evidence of evolution”. Discuss.
Q. No. 8
(a) “Hardy Weinberg Law provides the basis for modern synthesis on the mechanism of evolution.” Explain.
(b) “Darwin and Wallace worked under identical conditions but in different areas to develop the theory of natural selection.” Justify the statement.
Q. No. 9
(a) Define an ecosystem. Discuss the system considering the example of a pond as an almost complete ecosystem.
(b) List four adaptations of animals to desert conditions.