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THE FUTURE FOUNDATION SCHOOL PRE BOARD EXAMINATION SESSION 2022 2023 BIOLOGY SCIENCE Paper 3 (Two hours) (Maximum Marks : 80) CLASS X DATE 03.01.23. 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. _____________________________________________________________________________ Section A is compulsory. Attempt any four questions from Section B. The intended marks for questions or parts of questions are given in brackets [ ]. _____________________________________________________________________________ SECTION A (Attempt all questions from this Section) Question 1. Select the correct answers to the questions from the given options: [15] (i) A pair of corresponding chromosomes of the same shape and size but one from each parent. (a) Autosomes (b) Sex chromosomes (c) Homologous chromosomes (d) Analogous chromosomes (ii) The solvent used to dissolve the chlorophyll pigment while testing a leaf for starch. (a) Soda Lime (b) Carbolic acid (c) Methylated spirit (d) Water (iii) Wooden doors swell up during the rainy season due to______________. (a) Osmosis (b) Diffusion (c) Imbibition (d) Transpiration (iv) A plant with variegated leaves is__________________. (a) Coleus (b) Lotus (c) Peepal (d) Mango (v) The pressure exerted by the cell contents on the cell wall: (a) Turgor pressure (b) Partial pressure (c) Wall pressure This Paper consists of 7 printed pages and 1 blank page. 2022 Turn over
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