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ISC Class Prelims 2019 : Biology

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Full Marks- The Heritage School Pre Board Examination -2018-19 Subject -Biology paper I (Iheory) Class- XII 70 Downloaded from TestPaperz.com Time - 3 Hrs (Candidates are allowed additional 15 minutes for only reading the paper. They must NOT start writing during this time) This paper comprises of TWO PARTS- Port Answer All I and Part II. questions. z. co m Purt I contains twenty questions of one mark each. Part II consists of Section A, B & C. Section A contains seven questions of tuto morlcs each. Section B contains seven questions of thrce marlcs each, and Section C contains three questions ofJive marlcs each. Internal choices have been provided in two qaestions in Section A, two qaestions in Seetion B and in all three questions of Section C. er PART I (20 Marks) Question ap Answer all questions 1 tp (a)Answer the following questions briefly and to the point: [8x1] ht tp s: //t es (i) Name any two techniques that serve the purpose of early diagnosis of some bactenal / viral diseases. (ii) Name the Indian variety of rice patented by an American Company. Name the bacterium that was used as bio pesticide for the fust time. (iii) Mention two objectives of setting GEAC by our government. (iv)Name the cell organelle that help in the formation of acrosome. State the function of sertoli cells. (v) Give one significant difference between Primary and Secondary Productivity. (vi)How do algal bloom atTect the life in water bodies? (vii) How is primary succession different frorn secondary succession? (viii)What are hot spots? Name a lake in India that is considered as sacred lake. (b)Each of the following questions has four choices. Choose the best option in each case: [4x1J (i)Polar bodies are formed during: I.Spermatogenesis Iil.Fertiiization Il.Oogenesis IV.Cleavage This question paper consists of tive Downloaded from TestPaperz.com printed pages

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