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ICSE Class X Prelims 2022 : Biology (Don Bosco Academy (DBA), Patna)

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1 Don Bosco Academy, Patna Send Up Examination 2021-22 Biology STD X Mark -80 Time 2 hrs Section I ( 40 Marks) Attempt all questions from this section. Question 1 A. Name the following. (5) 1. The mineral necessary for the clotting of blood. 2. Point of attachment of chromatids of a chromosome. 3. The pressure responsible for guttation in plants. 4. Minute pores located on the bark of woody stem. 5. The pigment that gives characteristic colour to urine. B. State the exact location of the following. ( 5) i. Urinary bladder ii. Pacemaker iii. Endothelium iv. Hydathodes v. Spleen C. Choose the odd one from the following sets of terms and write the category of other three. (5) a. Phosphate, Thiamine, pentose sugar, adenine. b. eosinophil, monocyte, neutrophil, basophil. c. Coronary artery, hepatic artery, pulmonary artery, renal artery. d. Malpighian capsule, PCT, Henle s Loop, DCT. e. Large leaf, fewer stomata, thick cuticle, sunken stomata. D. Match the items in Column A with the most appropriate in column B. Re write the matching pair. (5) Column A Column B Cytosine Vasopressin vacuole Guanine sunken stomata Adenine Myocardial infarction Turgidity ADH Nerium Coronary thrombosis pelvis E. Choose the correct answer from the four options given below. (5) a. The Scientist who discovered the chromosomes. (Walther Flemming, Watson and Crick, Rosalind Franklin, Robert Hooke) b. Pulse wave is caused due to:(systole of left atria, systole of right atria, systole of left ventricle, systole of right ventricle) c. An inorganic component of urine: (Urea, ammonia, uric acid, creatinine) d. A vessel through which colurless fluid circulate. (blood capillary, lymph vessel, artery, Vein) e. Absorption of water by dry hydrophilic substance. (Osmosis, imbibition, diffusion, plasmolysis) F. Copy and write the functional activity of the following. (5) 1. Xylem and ----------------

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