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Icse bio grade 10 for 2015

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Guess Paper Class X Subject BIOLOGY [Time 1 1/2 Hrs] [Full Marks 80] Section I (40 Marks) Attempt all questions from this section. Question 1. (a) Name the followings : (i) The plastids found in the cells of yellow-coloured petals. (ii) The process by which molecules evenly distribute themselves within the space they occupy. (iii) The constituent of blood that initiates the clotting process. (iv) The endocrine cells present in pancreas. (v) The chemicals leading to the formation of ozone holes. [5] (b) Fill in the blanks : (i) Genes are in pairs, known as _________________ . (ii) The leaves of the ______________ plants have cuticular wax. (iii) Brain and spinal cord are the parts of _____________ nervous system. (iv) Government conducts a __________ to maintain a record of the number, and place of residence. (v) Roots of leguminous plants contain nitrogen-fixing _____________ . [5] (c) Write T for true and F for false statements : (i) In mitosis prophase is of short duration. (ii) Raisin swells up when kept in hypotonic. (iii) Photosynthesis takes place in chloroplast. (iv) The net filtration pressure in the glomerulus is 25 mm of Hg. (v) Typhoid germs are transmitted by tse-tse fly. [5] (d) Define the following : (i) Law of dominance (ii) Transpiration (iii) Blood transfusion (iv) Synapse (v) Vasectomy. [5] (e) Distinguish between : (i) Diffusion and Osmosis. (ii) Ureter and Urethra. (iii) Hormones and Enzymes. (iv) Foetus and Embryo. (v) Blood plasma and Serum. [5] (f) Match the column A with the column B of following : [5] S. N. Column A Column B 1 Dauter chromosomes move to opposite poles of the Cornea spindle. 2 Bends light and protects the inner eye. Prophase 3 Hyposecretion of Thyroxine. Vaccination 4 Chromosomes become visible as fine long threads. Diabetes 5 The introduction of serum vaccine. Anaphase (g) Choose the odd one in each of the following : (i) simple goitre, diabetes, cretinism, myxoedema. (ii) cerebrum, cerebellum, thalamus, hypothalamus. (iii) glucose, starch, cellulose, calcium. (iv) adrenalin, penicillin, insulin, thyroxin. (v) ovary, ureter, fallopian tube, uterus. (h) Write function of the following : (i) Chromosomes. (ii) Corpus luteum. (iii) WHO. (iv) Cerebrum. (v) Vaccine. Sectin II (40 marks) Answer any four question from this section. Question 2. (a) Answer the following : (i) Draw a neat labeled diagram to show the metaphase stage of mitosis in an animal cell having four chromosome. (ii) How many daughter cells are formed at the end of mitosis and at the end of meiosis. (iii) Write two harmful effects of noise pollution. (iv) Write one source of thermal pollution. [5] (b) In a certain species of animals black fur (B) is dominant over brown fur (b). Predict a genotype and phenotype of the off-springs when both parents are Bb or have heterozygous black fur. [3] (c) What is gene ? What is genetic disease ? Name two genetic diseases. [2] Question 3. (a) Give biological reasons for : (i) Transplanting of seedling to a flower bed in the evening is better than doing so in the morning. (ii) Springs of potato placed in 50% sucrose solution appear soft and shriveled. [2] (b) Device a simple experiment to show the conduction of food material by plant. Name the tissue which conducts food material in plant. (Draw the diagram of the experiment). [5] (c) Describe three conditions which affect transpiration. [3] Question 4. (a) What is meant by photolysis of water ? Draw a neat labeled diagram of the experimental set up to show that green plants give out oxygen during photosynthesis. [5] (b) Draw a labeled diagram of a myelinated neuron. What is meant by reflex action ? Write the function of Medulla oblongata. [5] Question 5. (a) Draw a labeled diagram of the inner ear. Name the part of the inner ear that is responsible for static balance in human being. [3] (b) What is meant by power of accommodation ? Name the muscles of the eye responsible for the same. Mention two functions of the choroids coat in the eye. [2] (c) Draw a diagram of human sperm and label the following parts : head, middle piece, acrosome, mitochondria, tail. [3] (d) Most often only one embryo is formed at a time although there are two ovaries in woman. Explain this. What is meant by gestation period ? [2] Other Educational Portals Question 6. (a) Complete the following table by filling in blank space 1 t0 8. [4] Name of gland Substance produced One important function Beta cells Islets of Langerhans .. .. Adrenaline .. Thyroxine L.H. .. (b) Mention two methods of controlling water pollution. [1] (c) Mention two reasons for increase in population in India. Why resources cannot keep pace with the rising population ? Give two examples. [3] (d) State the function of Red Cross. [2] Question 7. (a) What is a blood group ? Explain the importance of matching blood groups at the time of blood transfusion. What is the Rh factor ? [2] (b) Make a neatly labeled sketch of the heart chambers and valves during atrial systole. [3] (c) Name three : (i) Substances that are reabsorbed from the renal tubules by the secondary capillaries. (ii) Excretory organs and also the substances excreted by the named organs. [2] (d) Explain briefly : (i) Energy requirement of the kidney is very high. (ii) A person can live normally even if one kidney fails to function. (iii) Urination is more frequent during the day than at night. [3] For further enquiry contact : www.nathmp3.wapka.me (pradyutnathradhae@gmail.com)

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