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ICSE Class X Prelims 2023 : Biology (St. Mary's ICSE School, Koparkhairane, Navi Mumbai)

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Indian Certificate of Secondary Education (ICSE), New Delhi

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St. Mary's ICSE School, Koparkhairane First Preliminary Examination Biology (Two hours) Grade: X Marks: 80 Attempt all the questions. paper must be written on the paper provided separately. not be allowed to write during the first 15 minutes. his time is to be spent in reading the Question Paper. Answers to this ouWill he time given at the head of this Daper is the time allowed for writing the answers. he intended marks for questions or parts of questions are given in brackets . J (You should begin each answer on a fresh page.) SECTION A(40 Marks Question 1 Select the correct answers to the questions from the options. (Do not copy the question. Write the correct answer only): ) Hormone concerned with facing dangers is: a. Adrenaline (ii) b. Insulin b. Renal artery d. Glucagon C. Dorsal aorta d. Hepatic vein Which one of these is not an external factor that affects transpiration: a. Temperature c. Water content of the leaves (v) C. Vasopressin The blood vessel that supplies blood to the kidney is: a. Renal vein (111) [15] b. Humidity d. Velocity of wind The pressure of the cell contents on the cell wall is called: a. Wall pressure b. Turgor pressure c. Osmotic pressure d. Atmospheric pressure 90f Chromosomes that can be found in a single sperm are: a. X and X (vi) b.Xand Y c.X or X d. Xor Y Which of the following fluids in our body does not possess the ability to circulate? Lymph b. Blood c. Tissue fluid d. Synovial fluid a. vii) Rapid and a massive rise in the world population that has occurred over the last few hundred years: a. Population explosion c. Population stagnation 99T (viil) b. Population control d. Population decline helps in keeping the shape ofthe eyeball: a. Aqueous humour b . Ciliary muscles ix) c. Conjunctiva d. Vitreous humour Which of these adaptations in leaves help the plants to perform photosynthesis effectively? b. Sunken stomata a. Large surface area c. Narrow leaves d. Thick cuticle uity the stage of mitosis with the hclp of the features given below: Centromere attachingt the two chromatids divides/ splits " C wO Sister chromatids of each chromosome separate and are drawn apart towards the opp poles by shortening of fibres #A furrow appears spindle a. (xi) Metaphase Ihe a. X11) C. Anaphase b. Telophase d. Prophase growth movements of plant parts in response to touch stimulus: Hydrotropism c. Geotropism b. Thigmotropism d. Phototropism Liver plays a very important role in detoxifying ammonia by transforming it into: a. Creatinine An example of particulate pollutant: a. Fly ash b. Ozone (xii) (XIV) c. Nitrogen b. Bile pigments C. Radon d. Urea d. SO2 The procedure which contributes in the production of sperms in seminiferous tubules is known as: a. Oogenesis b. c. d. Spermiation Spermatogenesis (xv) The a. Ampula Spermicide equalises the air pressure on either side of the ear drum allowing it to vibrate freely. b. Cochlea d. Utriculus c. Eustachian tube Question 2 Name the following. ) a. The pigment present in the rod cells of the retina b. Any agent or an environmental change which initiates a response in the body. C. The set of genes present in the cells of an organism.jaen (i) d. The type of bond joining the complementary nitrogenous bases. e. Oozing out of plant sap from the ruptured or cut surface of a plant. Arrange and rewrite the terms in each group in the correct order so as to be in a logical sequence beginning with the term that is underlined. a. Karyokinesis, S-phase, Cytokinesis, Gl phase, G2- phase. b. Sub-stomatal space, intercellular spaces, leaf veins, mesophyll cells, stomata. c. Chromatin fibre, Chromosome, Nucleotide, Nucleosome, Nitrogenous base. Fibrinogen, Thromboplastin, Thrombin Bowman's capsule, DCT, Loop of Henle, Glomerulus, PCT. d. Fidrin, Platelets, e. (ii) Choose the odd one out from the following terms and mention the category to which the other thrce belong. a. Gibberellins, Cytokinins, Thyroxine, Auxins b. Lens, Vestibule, Cormea, Pupil c. Na0, C02, CH4, H:0 d. Lymphocytes, Neutrophils, Eosinophils, Basophils e. Prostate gland, Cowper's gland, Seminal vesicle, Seminiferous tubules. State the (iv) exact location of the following a. Mitral valve b. Chordae tendinae structures: c. Pituitary gland d. Medulla oblongata e. Hydathodes State the chief role/ funetion of the following. (v a. Dendrites b. Ciliary bodyx C. Stomata d. Cerebellum e. Oxytocin SECTIONB(40 Marks) Question3 [] Define 'Angina pectoris'. ii) [2] Name the two phases of a cell cycle. reference to arrangement of cytons and Differentiate between: Cerebrum and Spinal cord with (ii) [21 2 of neurons. with the help of a suitable example. ratios of F2 generation in the progeny Punnet square and find out the genotypic and phenotypic Explain 'chemotropism' (iv) Make a (v) axons 13] of a genetic cross between: Purple flower variety of pea (PP) with white flower variety of pea (Pp). Question 4 i) (ii) Expand the abbreviation: IAA heart. Name two blood vessels leaving the (il) Give scientific reasons: a. Haemophilia is generally seen in b. The pancreas is referred to as an [1] [2 2] human males than in human females. exo-endocrine gland. What is corpus callosum? Write its functior (iv) (v) Draw a neat diagram of myopia and its correction using suitable lens. [2] [3] Question 5 i) (i) (ii) (iv) Define gene. menarche and menopause. Give the differences between for population explosion inIndia. Explain any two factors responsible from the soil. r of roots that enable them to draw water Mention any two characteristics C3 [21 2 [21 (v) Study the given diagra and answer the questions given below. 3 A a. Identify the part labelled A. b. State the function of B. C. Name the fluid in present the median canal of the part labelledA. Question 6 ) i) (iii) State Mendel's law of dominance. What is parthenocarpy? Give examples. Name of the hormone Thyroxine [2] Undersecretion (Name of the disorder) Cretinism Growth hormone (iv) (v [2 Complete the table: B Mention any two harmful effects of noise pollution Name of the disorder) A Gigantismn [21 The diagram given below demonstrates a physiological process taking place in green plants. The whole set-up was placed in bright sunlight for several hours. Study the diagram and answer the questions that follow. 131 a. What is the aim of the experiment? b. Name the part marked 2 in this experimental set-up. C. Oversecretion How can you test and confirm the gas in the test tube? 41

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