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KARNATAKA ICSE SCHOOLS ASSOCIATION PREPARATORY EXAMINATION JANUARY 2020 ___________________________________________________________________________ Class: X Subject: Science- Biology (Paper 3) Max. Marks: 80 Duration: 2hrs Date : ___.___. 2020 Instructions: Answers to this Paper must be written on the paper provided separately You will not be allowed to write during the first 15 minutes. This time is to be spent in reading the Question Paper. The time given at the head of this paper is the time allowed for writing the answers Attempt all questions from Section I and any four from Section II. The intended marks for questions or parts of questions, are given in brackets [ ]. Section I (40 Marks) Attempt all questions from this section Question 1 (a) Complete the following paragraph by filling in the blanks (i) to (v) with appropriate words/phrases: [5] Charles Darwin proposed the theory of ____ (i) ____. According to this theory, the organisms produce more offspring than that can survive. This is called ____ (ii) ___. This creates competition among them and there is struggle for ____ (iii) ___. This struggle eliminates the unfit individuals. The fit organisms posses some ____ (iv) ___ survive and reproduce. These (iv mentioned alongside) accumulate over a long period of time lead to the ___ (v) ___. (b)Name the following: [5] (i) The pressure exerted by a concentrated cell sap on a solvent to prevent its movement from a solution of lower concentration to a solution of higher concentration through a semi permeable membrane. (ii) The part of the brain that controls heart beat and breathing. (iii) The main nitrogenous waste eliminated through kidneys in humans. (iv) The statistical study of human population. (v) A tough structure that serves as a blood vascular connection between foetus and uterine wall. (c) Choose the correct answer from each of the four options given below: (i) In Hyperopia the light is (A) Focussed behind retina (B) Focussed in front of retina (C) Focussed on retina (D) Scattered in the vitreous humour (ii) A plant kept in the dark room ensures that the (A) plant is free from starch (B) leaves of the plant are free from chlorophyll (C) leaves of the plant are free from starch (D) plant is free from chlorophyll (iii) The number of homologous pairs of chromosomes present in a diploid cell of human male cell (A) 46 pairs (B) 22 Pairs (C) 23 pairs (D) one pair (iv) In trees most of the transpiration occurs through [5]
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