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Raviraj Thorat
The Bishop's School, Camp, Pune

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..1.. THE BISHOP S CO-ED. SCHOOL, KALYANI NAGAR PUNE SECOND PRELIMINARY EXAMINATION (2017-2018) BIOLOGY CLASS: 10 READING TIME: 15 MINUTES HOURS DATE: 01.12.2017 ..1.. TOTAL MARKS: 80 WRITING TIME: 2 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 I (40 Marks) Attempt all questions from this section Question 1 (a) Name the following: (5) (i) The tubular knot fitting like a cap on the upper surface of the testes. (ii) The muscles which make up the wall of the heart. (iii) The stage during which nuclear membrane and nucleotide reappear. (iv) A free living bacteria which helps in nitrogen fixation. (v) Light in which maximum rate of photosynthesis takes place. (b) Choose the correct answer from each of the four options given below: (5) (i) The region in the eye where rods and cones are located is: A. Choroid B. Sclera C. Retina D. Cornea (ii) The period between two successive mitotic divisions is: A. Mitosis B. Anaphase C. Interphase D. Diakinesis (iii) Marine fish when thrown under tap water bursts because of: A. Diffusion B. Plasmolysis C. Endosmosis D. Exosmosis (iv) Introduction of dead and weak microbes into the body is termed: A. Immunization B. Vaccine C. Sterilization D. Vaccination (v) The site of maturation of human sperms is the: A. Seminiferous tubule B. Epididymis C. Interstitial cells D. Prostate gland (c) The statements given below are incorrect. Rewrite the correct statement by changing the underlined words of the statements. (5) ..2.. (i) Urine leaves the urinary bladder of a female by means of the uterus. (ii) The part of the ear associated with balance is cochlea. (iii) Adrenal cortex produces emergency hormone adrenaline. (iv) Cilia lining the oviducal funnel push the released ovum into the vagina. (v) The Graafian follicle after ovulation turns into a hormone producing tissue called corpus callosum. (d) Given below are sets of terms. Rewrite the terms in correct order in a logical sequence. (5) (i) Luteal phase, follicular phase, menstrual phase, ovulatory phase. (ii) Ear ossicles, oval window, tympanum, auditory canal, cochlea. (iii) Vagina, fallopian tube, ovary, cervix, uterus. (iv) Fibrin, platelets, thromboplastin, fibrinogen, thrombin. (v) Soil water, root hair, cells of cortex, epidermis, xylem. (e) Choose the odd one out of the following terms given and name the category to which the others belong. (5) (i) Afferent arteriole, efferent arteriole, vasa recta, glomerulus. (ii) Oestrogen, progesterone, testosterone, prolactin. (iii) Myopia, cataract, cretinism, hypermetropia. (iv) Light intensity, water content, temperature, chlorophyll. (v) Stomata, cuticle, lenticels, hydathodes. (f) Given below are groups of terms. In each group the first pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis. (5) (i) Ovulatory phase: Ovulation; Luteal phase: __________. (ii) Heart: Pericardium; Foetus: __________. (iii) Stomata: Transpiration; Hydathode: __________. (iv) Mitosis: Equational division; Meiosis: __________. (v) Sperms: Spermatogenesis; Ova: __________. (g) Match the items given in the Column A with the most appropriate ones in Column B and rewrite the correct matching pairs. (5) Column A Column B (i) Acrosome Mortality (ii) Euro norms Collects sound waves (iii) Root pressure Spermatozoa (iv) Death rate Natality (v) Pinna Vehicular standards Ascent of sap (h) Given below is the outline of the male reproductive system. (5) ..3.. (i) Name the parts labelled 1 to 5. (ii) State the functions of the parts labelled 1 and 4. (iii) Name the cells of part 5 that produce testosterone. (iv) Why is the structure 5 present outside the body in the scrotal sacs? SECTION II (40 Marks) Attempt any four questions from this section Question 2 (a) Given below is a stage during Study it questions that follow: a diagram representing mitotic cell division. carefully and answer the (5) (i) Is it a plant cell or an animal cell? Give a reason to support your answer. (ii) Identify the stage shown. (iii) Name the stage that follows the one shown here. How is that stage identified? (iv) How will you differentiate between mitosis and meiosis on the basis of the chromosome number in the daughter cell? (b) Differentiate between the following pairs on the basis of what is mentioned in brackets. (5) (i) Foetus and Embryo (Age) (ii) Systole and diastole (condition of heart) (iii) Semen and sperm (definition) (iv) IUD and MTP (expand the abbreviation) (v) Turgor pressure and wall pressure (direction of pressure) Question 3 (a) The diagram below represents a sectional view of the human female reproductive system. (5) ..4.. (i) Name the parts labelled 1 to 7. (ii) State one main function of the parts 5 and 6. (iii) What happens to the uterus if fertilization fails to take place? (b) Explain the following terms: (5) (i) Variation (ii) Parturition (iii) Population density (iv) Prophylaxis (v) Smog Question 4 (a) Given below are the diagrams of a certain structure in plants in two conditions: (5) A B (i) Name the structure shown. (ii) Name the parts numbered 1-5. (iii) What is the most apparent difference between A and B in the structure shown? (iv) The structure helps in the process of transpiration. Explain the term transpiration. (b) Mention the exact location of the following: (5) (i) Chlorophyll (ii) Pulmonary vein (iii) Renal pyramids (iv) Placenta (v) Islets of Langerhans Question 5 (a) The given diagram represents a nephron and its blood supply. Study the diagram and answer the questions that follow. (5) ..5.. (i) Label the parts 1, 2, 3 and 4. (ii) State the reason for the high hydrostatic pressure in the glomerulus. (iii) Name the blood vessel which contains the least amount of urea in this diagram. (iv) Name the two main stages of urine formation. (v) Name the part of the nephron which lies in the renal medulla. (b) Give biological reasons for the following statements. (5) (i) Birth rate is high in India as compared to other countries. (ii) Leaves of wilted lettuce, if kept in cold water become crisp. (iii) S A node is called the pacemaker of the heart. (iv) Deficiency of Vitamin A causes night blindness. (v) Most often only one embryo is formed at a time although there are two ovaries in a woman. Question 6 (a) Given below is a schematic diagram showing Mendel s experiment on sweet pea plants having axial flowers with round seed [AARR] and terminal flowers with wrinkled seeds [aarr]. Study the same and answer the questions that follow: (5) (i) Give the phenotype of F1 progeny. (ii) Give the phenotype of F2 progeny produced upon by selfpollination of F1 progeny. (iii) Give an example of Y linked disorder or disease. (iv) Name and explain the law introduced by Mendel on the basis of the above observation. (b) Give appropriate biological/technical terms for the following: (5) ..6.. (i) The process by which intact plants lose water in the form of droplets. (ii) The cutting and ligation of vas deferens in male. (iii) The inherent ability of the body to resist infection. (iv) The muscle which controls urination. (v) The process of attachment of fertilised ovum to uterine wall. Question 7 (a) Given below is a diagram depicting a defect of the human eye. Study the same and then answer the questions that follow. (5) (i) Name the defect shown in the diagram. (ii) Name two possible reasons for this defect of the eye in human beings. (iii) Name the parts labelled 1 to 4. (iv) Draw a labelled diagram to show how the above-mentioned defect is rectified using an appropriate lens. (b) State the main function of the following: (5) (i) Seminal vesicle (ii) Oxytocin (iii) Vena Cava (iv) Ear drum (v) Thrombocytes ========================================== =======

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