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THE T{ERITAGE SCHOOL pRE, BOARDS EXAMINATIONS, 201 8_2019 SUBJECT. SCIENCE PAPER III (BIOLOGY) CLASS.X Answers to this paper must be u:t-iten on the pdper provided sepctrately. You will not be allo'toed to u rite during the first l5 minutes. This time is to be speht in reading the Question paper. The time at the head of this P is the tine allowed for the answers. Attempt all questions from Section I and any four questiois from Sectiotrll. The intended marks for dre in brackets Full Marks: 80 f ime: 2 hrs SECTION I ({0 Marks) Attempt all questions front this section, Question 1. lollowingi) The tube that connects the cavity of middle ear with the throat. ii) The nrain natural auxin found in plants. iii) The valve present between right atrium and right ventricle. iv) The only gaseous hormone. v) The part of brain which controls all loluntary actions. a) Name the b) Fill in the blanks- 1-.-. successor of tsl tsl represented the first man-like ancestor. Neanderthal man were the 2 . Neanderthai man had cranial capacity of about and showed _4_ locomotion. Homo sapiens is believed to have arisen from the main Nean<ierthal population and developed into c) Choose the conect i) option- Ma"ximum amount of w'ater from the glomerular filtrate is reabsorbed in a) descending limb of loop of Henle b) ascending limb of loop of Henle c) proximal convoluted tubule d) distal convoluted tubule ii) Hyposecretion of insulin causes a) myxoeCema b) diabetes mellitus c) diabetes insipidus d) cretinism iii) The nucleic acid, of which a chromosome is mainly composed of, is a) RNA b) histones c) DNA d) AMp This paper consists of 7 printed pages 15]
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