Zoology CSS Paper II 2015

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.
NOTE: (i) PART II is to be attempted on separate Answer Book.
(ii) Attempt only FOUR questions from PART II, selecting TWO questions from each SECTION. All questions carry EQUAL marks.
(iii) Extra attempt of any question or any part of the attempted question will not be considered.

Q. No.2. (a) What is gene expression? Describe the role of tRNA, mRNA and rRNA in protein synthesis?
(b) Describe the structure and function of Golgi Complex?
Q.No. 3. (a) How Hypothalamus-Pituitary Gland regulate and control thyroid endocrine functions in mammals?
(b) How oxygen is transported in blood?
Q.No.4 (a) What is the role of nephrons in urine formation? How different types of Leukocytes (white blood cell) are formed in body?
(b) How proteins are digested and absorbed in gastrointestinal tract?
Q.No.5 (a) Compare Mendelian Principle of Segregation with that of Independent Assortment?
(b) How external environment effects gene expression?

Q.No.6 (a) “Ontogeny repeats phylogeny”. Discuss and compare the Theory of Recapitulation (Biogenic Law) proposed by Ernst Haeckel with Von Baer’s Rule of Embryology, postulated by Karl Ernst Ritter von Baer.
(b) How you will reconcile the debate between religion and science on the issue of evolution of human being.
Q.No.7 (a) “Living (biotic) organisms and their non-living (abiotic) environment are inseparably interrelated and interact upon each other” Discuss.
(b) Define and differentiate between:
(i) Food chain and food web
(ii) Stenothermal and Eurythermal
(iii) Lentic and lotic communities
(vi) Fisheries and Aquaculture
Q.No.8 (a) “Ecosystems are capable of self-maintenance and self-regulation as are their component populations and organisms” Discuss.
(b) Write short notes on
(i)Conservation of Biodiversity
(ii) Climate change and Global Warming
(iii) Liebig’s Law of the Minimum
(vi) Positive Interactions (Commensalism, Cooperation and Mutualism)


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