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ICSE Notes 2018 : Biology (St. Michaels School (SMS), Siliguri, Jalpaiguri)

3 pages, 30 questions, 29 questions with responses, 46 total responses,    0    0
Nimish Jain
St. Michael's School (SMS), Siliguri, Jalpaiguri
3RD TO 10TH
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CLASS X-BIOLOGY SAMPLE PAPER-3 A. NAME THE FOLLOWING; (5) 1. The inner walls of the mitochondia thrown into folds. 2. Any of the alternate forms of a gene, which occupy the same relative position on homologous chromosomes. 3. The protein along with DNA that constitutes the chromatin fibre. 4. The upward movement of water and minerals from the root to the leaves through the xylem. 5. The tissue found in human cheek. B. Give appropriate terms for the following: (5) 1. An apparatus used to demonstrate respiration. 2. the process of killing pathogenic organisms by heat radiation or chemicals 3. the process in which two gametes unite to form a zygote. 4. the ability of an organism to resist infections 5. a yellowish fluid that remains after blood clotting C. Give reasons; (5x2) 1. Photosynthesis stops if the temperature is raised above 35oC. 2. Fresh water fish cannot survive in sea water. 3. Diabetes insipidus differs from diabetes mellitus. 4. Injection of adrenalin increases the heart beat. 5. A closed can of dried seeds bursts open if some water enters it by accident. D. Complete the following statements by choosing the correct alternative from those given in the brackets (5) 1. Bacteria found in the nodules of leguminous plants are----------- ( parasitic, saprophytic, symbiotic ) in nature. 2. A plant that has hydatodes is --------------(banana, fern, mango) 3. The embryo inside the uterus is protected from jerks and mechanical shocks by ------ (allantois, uterine wall, amniotic fluid). 4. The gland that has both endocrine and exocrine functions is the ----------.( pituitary gland ,adrenal gland ,pancreas) 5. The mineral element essential for the clotting of blood is --------(iron,iodine,calcium). E. Match the columns; (6) Column 1 1. 2. 3. 4. 5. 6. dendrons Responsible for arranging blood donation camps Liquid part of blood without corpuscles promotes medical education & training Basic unit of the brain Liquid squeezed out during clotting Column 2 red cross serum neuron nerve impulse plasma , WHO F: The following diagram represents the human brain. Answer the following questions; (6) 1. Name the parts labeled 1-4 (4) 2. What is the main function of part 3? (1) 3. Name the sheet of nerve fibres that connect the two halves of the part labeled 1 (1) Answers: A 1. cristae 2. alleles 3. histones 4. ascent of sap 5. squamous epithelium B 1. 2. 3. 4. 5. respiroscope. sterilization fertilization immunity serum C 1. Above 35oC enzymes get denatured and inactivated-hence photosynthesis stops. 2. The concentrations of salts in fresh water differ from that of sea water. Hence fresh water fish cannot survive in sea water due to imbalance in osmotic gradients. 3. Diabetes insipidus is caused due to deficiency of vasopressin whereas diabetes mellitus is caused due to extra deposition of glucose in blood as glycogen in the liver and nucleus. 4. Since adrenalin helps to release extra glucose into the blood, to transport this glucose to all parts of the body for extra energy the heart has to beat faster. 5. A closed can of dried seeds burst open if some water enters it by accident because of imbibition pressure. D 1.symbiotic 2. Banana 3. Amniotic fluid. 4. Pancreas . 5. Calcium E 1. 2. 3. 4. 5. 6. dendrons Responsible for arranging blood donation camps Liquid part of blood without corpuscles promotes medical education & training Basic unit of the brain Liquid squeezed out during clotting 1. 2. 3. 4. Cerebrum Cerebellum Medulla oblongata Spinal cord nerve impulse red cross plasma WHO neuron serum F 2. Medulla oblongata: controls the involuntary actions of the human body. 3. Corpus callosum

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