Zoology CSS Paper II 2012
FEDERAL PUBLIC SERVICE COMMISSION
COMPETITIVE EXAMINATION FOR
RECRUITMENT TO POSTS IN BS 17
UNDER THE FEDERAL GOVERNMENT, 2012
ZOOLOGY PAPER II
TIME ALLOWED: THREE HOURS MAXIMUM MARKS: 100
NOTE: (i) First attempt PART I (MCQs) on separate Answer Sheet which shall be taken back after 30 minutes.
(ii) Overwriting/cutting of the options / answers will not be given credit.
Section 1
Q.1 (a) Describe structures and function of ribosomes
(b) Describe the structure and function of endoplasmic reticulum.
Q.3 (a) In the respiratory mechanism explain transport of oxygen in the arterial blood
(b) How transport of carbon dioxide in blood takes place.Explain.
Q.4 (a) Under what conditions the following phenotypic ratios are obtained;
A. 9:7 B. 9:3:4 C. 13:3 D. 9:3:3:1
(b) Explain the following chromosomal aberrations and their evolutionary significance:
A.Deficiency B.Duplication C.Translocation D.Inversion
Q.5 (a) Describe in detail glomerular filtration and glomerular filtrate. Illustrate your answer with suitable diagrams.
(b) Discuss absorption in small intestine of different food constituents like carbohydrates,fats,water,lipids.Give suitable diagrams.
Section-2
Q.6 (a)What is the role of Natural selection in biological process?Explain
(b) How would you compare Lamarck’s theory of evolution and Darwin’s concept of evolution?Explain.
Q.7 (a) Explain pond ecosystem with reference to:
A. Abiotic substance B. Producer organisms C. consumer organisms D. Decomposers
(b) Give description of Nitrogen and Phosphorous cycles.
Q.8 (a) Explain important features of watson and Crick’s model of DNA
(b) Explain transcription and the role of mRNA.
Q.9 Write short notes on:
A. Linkage B. Habitat C. Biological species D. Gene mutation.
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