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ISC Board Specimen 2011 : Biology Paper 1 (Theory)

5 pages, 63 questions, 38 questions with responses, 69 total responses,    0    0
ISC 12th
Indian School Certificate Examination (ISC), New Delhi
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BIOLOGY Paper 1 (THEORY) (Botany and Zoology) (Three hours) (Candidates are allowed additional 15 minutes for only reading the paper. They must NOT start writing during this time) ----------------------------------------------------------------------Answer all questions in Part I and five questions in Part II, choosing three questions from Section A and two questions from Section B. All working including rough work, should be done on the same sheet as, and adjacent to, the rest of the answer. The intended marks for questions or parts of questions are given in brackets [ ]. ---------------------------------------------------------------------------------------------------------------------------- PART I Answer all questions Question 1 (a) Mention one significant difference between each of the following: (i) Vaccination and Sterilization. (ii) Renin and Rennin. (iii) Aeroponics and Hydroponics. (iv) Yellow Spot and Blind Spot. (v) [5] Collenchyma and Sclerenchyma (b) Give reasons for the following: [5] (i) Nerve impulses on a neuron travel only in one direction. (ii) Erythrocytes perform anaerobic respiration only. (iii) Endosperm in Castor seed is triploid. (iv) Man can live without food for several days but cannot live without oxygen for even a few minutes. (v) Transpiration is a necessary evil. ------------------------------------------------------------------------------------------------------------------------------ISC Specimen Question Paper 32

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