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BIOLOGY SAMPLE PAPER

8 pages, 87 questions, 72 questions with responses, 95 total responses,

Unicorn
Niraj Public School (NPS), Hyderabad
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M.M. 80 SECTION 1 (Attempt all question from this section) 40 Marks Q.1 (a) Give Scientific term for the following (1 5 = 5) (i). Thick and dark coloured layer of Eye. (ii). Dead openings found on the bark of stem. (iii). Squeezing of W.B.C from capillaries. (iv). Pressure developed in root cells. (v). A cell organelle found in Head of sperm. (b) Here are given few terms, place them at the appropriate place in the following paragraph. Placenta, Parturition, Ovulation, Fertilization, Gestation, Capaciation, Implantation, Insemination This discharge of an ovum from ovary to the oviducal funnel is called as ___________. Fallopian tube is the site of ___________. _____________ occurs with uterus. ___________ provides nutrients and oxygen to the developing embryo. _________ occurs at the end of gestation period which is about 280 days in human. (c) State whether the following statements are true or false, if false than correct them by changing first or the last word. (1 5 = 5) (i). Antibodies combat with antibiotics. (ii). Active immunity provides immediate effect. (iii). Glycosuria is a condition of Diabetes incipidus. (iv). Sartoli cells of testes secrete testosterone hormone. (v). Canal through which testes descend out is eustachian canal. (d) Define the following terms= 5) (i). Population Density (ii). W.H.O. (Definition) (functions) (iii). Crossing Over (iv). Nucleotide (1 5 (Definition and significance) (Chemical Composition) (v). Conditioned Reflex (Definition and Example) (e) Here are given some structure write their position and function. (5) Structure (i). Organ of Corti (ii). Grana (iii). Spleen (iv). S.A. Node Position Function (v). Suspensory Ligaments (f) Write most significant following pairs. (5) difference in 1. Reduction Division - Mutations. 3. Homozygous - the Equational Division 2. Variations between Heterozygous 4. Gene 5. Allosome - Chromosome. Autosomes (g) Here are given some terms, Explain the significance of these terms- (5) (i). Guttation (ii). Centromere (iii). Disinfectant (iv). Osmotic pressure (v). Transpiration pull (h) Write one word which processes and explain them. (5) will be suitable for 1. Ability of eye to focus near and distant object. 2. Swelling of seeds soaked in water. 3. Transmission of characters from parents to off springs. these 4. Ingulfing of microbes by leucocytes. 5. Shrinking of R.B.C. when placed in hypertonic solution. SECTION II (Attempt any four questions from this section) 40 Marks Q.No. 2 (a) See the figure given here answer the following question and Identify the state, give reason to support your answer. (2) (i). (ii). Name the stage that will appear just after iii. What is interphase? Write events which occur in it. (1) iv.What is the reason that meiosis occurs only in germ cells? (b) Here are given some hormones write their source gland (1) and disease caused due to their hyposecretion. Hormone Hyposecretion (i). (ii). Source Gland Disease INSULIN A.D.H (iii). THYROXINE ( In children) (iv). Growth Hormone due to (v). ANDROGEN Q.No. 3 (a) i. Find out the following if a Round seed (R) and yellow seed (Y) pea plant in crossed with a wrinkled seed (r) and green seed (y) pea plant. a. ( ) b. Gametes produced from F1 ( ) c. ii. Genotype of F1 Phenotypes of F2 and their ration. ( ) Find out the inheritance of haemophilia in the offsprings if a normal man get married with a female who is phenotypically normal but her father was haemophilic. (2) (b) What will be the effect if(i). Saline drip given to a person suffering from dehydration. (ii). Cell sap filled in root hair get hypotonic after endosmosis. Dead or weak pathogen for any disease are introduced in the blood of a person. (iii). (iv). A plant is kept in the light of green colour. (v). A snarling guard dog starts barking on a person entering the residence. Q.No. 4 (a) See the diagram given alongside and answer the following question. i. Label the parts 1 4. ii. What will happen if part 2 get damaged. iii. iv. Why the surface of art labeled 1 is irregular? Name the protective membranes and fluid present around brain. What is the role and significance myelin sheath present on the axon. v. (b) (i). (ii). (iii). Draw a well labeled diagram of L.S. of human kidney. (2) Name three steps involved in urine formation. (2) Name two hormones involved in osmoregulation by kidney. (1) Q.No. 5 (a) Answer the following= 5) (1 5 (i). Name three phases of cardiac cycle. (ii). How the heart sounds are produced? (iii). Name an old age eye defect and state its cure. (iv). What are the changes for opening and closing of stomata? (v). What are the events occurring during clotting of blood? (b) With reference processes to photosynthesis define (i). Conversion of ADP into ATP in grana. (ii). Conversion of H2O into H+ and OH . (iii). Conversion of glucose into starch. (iv). Keeping a leaf in Alcohol during starch test. (v). Treating a leaf with Iodine during starch test. Q.No. 6 (a) Write short note on the following (i). Natality (ii). Mortality (iii). Vasectomy (iv). Effects of over population on a country (any two) (v). Reasons for population explosion in world (any two) following (b) Write the significance of following modification in plants and animals (i). Single celled root hair. (ii). Profusely branched venous system in a leaf. (iii). Thick and highly vascular wall of uterus. (iv). The presence of valves in veins. (v). Wider Afferent Arteriole than efferent Arteriole. Q.No. 7. Give statement suitable explanation for the following (i). It is necessary to destarch a plant before before performing an experiment for photosynthesis. (ii). A woody tree will transpire more than the herb. (iii). Oxygen is a by product of photosynthesis. (iv). Human heart shows double circulation. (v). A person will be unable to respond to a nail pinched on a figure if spinal cord is damaged.

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