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1 SMT. SULOCHANADEVI SINGHANIA SCHOOL, THANE. Class Sub. Exam Date Marks Time Total No. of Printed sides Prelim 10.02.2017 80 2 hrs 6 II Attempt all questions from Section I and any four questions from Section II. The intended marks for questions or parts of questions are given in brackets [ ]. 10 Biology SECTION I [40 MARKS] Attempt all questions from this Section Question1. A. Name the following: - [5] i) The type of cell division which occurs in the cells of the reproductive organs. ii) A plant with sunken stomata. iii) That part of the chloroplast where the light reaction of photosynthesis takes place. iv) The phase of the cardiac cycle in which the auricles contract. v) The cell body of a nerve cell. B. Choose the correct answer for each of the four options given below: (i) A plant cell may burst when: A. Turgor pressure equalizes wall pressure. B. Turgor pressure exceeds wall pressure. C. Wall pressure exceeds turgor pressure. D. None of the above. (ii) BCG vaccine is effective against: A. Cholera B. Mumps C. Tuberculosis D. Measles (iii) Cretinism and Myxoedema are due to: A. Hypersecretion of thyroxin B. Hypersecretion of growth hormone C. Hyposecretion of thyroxin D. Hyposecretion of growth hormone (iv) After mitotic cell division, a female human cell will have: A. 44 + XX chromosome B. 44 + XY chromosome (v) C. D. The nephrons discharge their urine at the : A. Urinary bladder B. Urethra C. Renal pelvis D. Renal pyramid 22 + X chromosome 22 + Y chromosome [5] 2 C.There are five terms given below in each set, one word is an odd term. Pick the odd man and state the category of others: [5] TERMS i. Cell wall, Vacuole, Centrosome, Mitochondria, Plastids CATEGORY ODD ONE ii. Blinking,Knitting without looking, Smiling , Blushing , Crying iii. Cowper s gland, Urethral gland, Lachrymal gland, Seminal Vesicles, Prostate gland. iv. Cresol , DDT, Lime, Mercurochrome, Bordeaux mixture v. Adrenal gland, Pancreas, Thyroid, Liver, Pituitary gland D.Copy and complete the following by filling in the blanks 1 to 5 with appropriate words: [5] The human female gonads are ovaries. A maturing egg in the ovary is present in a sac of cells called ________________(1) . As the egg grows larger, the follicle enlarges and gets filled with a fluid and is now called the ____________(2) follicle. The process of releasing the egg from the ovary is called ___________(3). The ovum is picked up by the oviduct funnel and fertilization takes place in the _____________(4). In about a week the blastocyst gets fixed in the endometrium of the uterus and this process is called ____________(5). E. Give the exact location of the following: i) ii) iii) iv) v) [5] Incus Amniotic fluid Ciliary body Hydathodes Eustachian tube F. Match the items in Column A with that which is most appropriate in Column B . Rewrite the matching pair: [5] Column A 1] Testis 2] Poliomyelitis 3] Transpiration 4] Clotting of blood 5] Uriniferous tubule Column B A] Kidney B] Water vapour C] Prostate gland D] Iron E] Uterus F] Gonad G] Salk s vaccine H] Water droplet I] Calcium G. Explain the following terms: - [5] a. Reflex arc c. Stereoscopic vision b. Imbibition d. Demography e. Photolysis of water 3 H. Study the following diagram carefully and then answer the questions that follow: [5] i] Name the part labeled 1 . ii] Mention any two functions of the part labeled 2 iii] Explain the role played by the part labeled 3. iv] What is the normal gestation period (in days) of the developing foetus in humans? SECTION II [40 MARKS] Attempt any four questions from this Section. Question 2 A) Given below is the diagram of the human ear. Study the same and answer the questions that follow: i) ii) iii) iv) [5] Label parts from A to E Name the fluid present in part labelled C. Name the part in the above diagram responsible for a) Collection of sound waves b) Static equilibrium. c) Conversion of sound waves to vibrations. Give the function of ear wax. B) Differentiate between the following on the basis of what is given in brackets: - [5] a. Red Cross and WHO (one activity) 4 b. c. d. e. Mitosis and Meiosis (site of occurrence) Nucleosome and Nucleotide (components) Guttation and Bleeding (definition) Lymphocytes and Neutrophils (function) Question 3. A. The figure given below show diagrammatic cross section of the kinds of blood vessels . Observe and answer the following questions:[5] a. Identify the blood vessel A and B. b. Name the parts labelled 1 to 4. c. Mention two structural differences between A and B. d. Name the type of blood that flow through A and B respectively. B. The diagram below represents a structure found in a leaf. Study the same and answer the questions that follow:-[5] a. Name the parts labelled A and B. b. What is the biological term for the above structure? c. What is the function of the labelled part A? d. Mention two structural features of part A which help in the function mentioned in (iii) above. e. Where is this structure likely to be found in a leaf? f. The above structure helps in the process of transpiration. Explain the term. g. How many cells are found surrounding this structure as seen in the diagram? Question 4 A. (i) Draw a well labeled diagram of the Human Excretory System. [5] 5 (ii) Based on the diagram drawn above in (i) give a suitable term for each of the following description:1. Primary excretory organs throwing out excretory products in the form of urine. 2. Blood vessel that carries nitrogenous wastes to the primary excretory organ. 3. Duct that carries urine to the temporary storage organ from where it is expelled out. 4. Temporary storage organ of urine. 5. Opening through which urine is expelled out. B. Give biological term for the following:- [5] i. Fluid portion of the blood. ii. Nerve that transmits impulses from the ear to the brain. Iii. Thin walled sac of skin that covers the testes. iv. The permanent stoppage of the menstrual cycle in a woman aged 50 years. v. Fixing of developing zygote on the uterine wall. vi. The sound produced when the atrioventricular valves close in the heart. vii. The internal layer of eye which prevents reflection of light. viii. The photosensitive pigment present in the rod cells of retina. ix. The protective membranes of the brain. x. The resting stage in Mitosis. Question 5 A) Name the hormones responsible for the following conditions /functions: i) ii) iii) iv) v) vi) [5] Increase in heartbeat. Maintains glucose level in the blood. Converting Glycogen to Glucose. Exophthalmic goiter Dwarfism Diabetes insipidus 2. Name the endocrine glands labelled 1 to 4. 1 4 2 3 B. Give scientific reasons for the following statements:a. Green leaves are thin and broad. b. Animals owe their existence to chlorophyll. c. Throat infections can lead to ear infection. d. Matured mammalian erythrocyte lacks nucleus and mitochondria. e. On bright sunny days the leaves of certain plants roll up. [5] 6 Question 6 A. The diagram below represents an important process in plants. Study the diagram and answer the question :[5] a. Name the factor being studied in the experiment. B . b. Why was the plant kept in dark room before conducting the experiment? c. Give a balanced chemical equation to represent the process of photosynthesis. d. Why was the leaf kept in (i) Boiling water (ii) Methylated spirit. e. What will be observed in the experimental leaf at the end of the starch test. f. Mention any two adaptations found in plants to reduce transpiration. a. Give two advantages of small family. [1] b. Expand: (i) BCG (ii) DTP c. List any two harmful effects of acid rain. d. Name two sulpha drugs that are effective against bacterial diseases. e. List any two reasons for a rise in population in the world. [1] [1] [1] [1] Question 7. A. Given below is a diagrammatic representation of a defect of the human eye:-[5] a. b. c. d. e. f. B. Identify the defect. Mention two reasons for the defect. State how the defect can be rectified, represent it with help of a diagram. Name the part of the eye responsible for maintaining the shape of the eyeball. State the Nature of the image formed. State the exact location of yellow spot. A homozygous Black eyed (B) rabbit with White Coat (W) is crossed with a homozygous Pink eyed (b) rabbit with Brown Coat(w). a) Give the Genotype and Phenotype of first filial generation. b) Give all the possible combination of the gametes that can be obtained from F1 hybrid. c) Give the dihybrid ratio and phenotype of the offsprings of F2 generation when two plants of F1 generation above are crossed. d) State the law which is in accordance to the above mentioned cross.
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