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ICSE Biology paper for class 10

6 pages, 85 questions, 8 questions with responses, 8 total responses,

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BISHOP COTTON BOYS SCHOOL :: BANGALORE SECOND TERM EXAMINATION :: DECEMBER :: 2010 SUBJECT : BIOLOGY STD :X MARKS : 80 DATE : 14.12.2010 TIME : 1 Hr. 30 Mins. You will not be allowed to write during the first FIFTEEN 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. The intended marks for question or parts of question are given in brackets [ ]. Answer any FOUR questions from Section-B THIS PAPER CONTAINS 6 PRINTED PAGE. SECTION - A [Attempt all questions from this section] I. (a) Name the following: 1. The type of immunity received from vaccination. 2. The pigment which gives colour to the urine. 3. The pituitary hormone which stimulates egg formation. 4. The hormone that can cause an increased flow of blood to skeletal muscles. 5. The curve obtained when the number of individuals in a population are plotted against the time. [5] (b) Select the correct answer out of the four available choices given under each question. [5] 1. Which of the following enters plant cells by active transport? (a) CO2 2. (b) NO3 (c) O2 In an osmosis experiment , four potato strips , each 5 cm. in length , were left in salt solutions of different concentrations. The table shows length of the strips after 30 minutes .Which salt solution was the most concentrated? Salt solution a b Length of strips after 30 minutes 4.8 cm 4.5 cm c d 3. (d) H2O 5.3 cm 5.0 cm The retinal layer in the eye is an example of (a) An organ in an organ system (c) (b) An organ in a tissue (d) Std.10/ 2010 2011 /2nd Term Examn../Sub : Biol./1 An organ system in an organ A tissue in an organ 4) Wooden doors swell during the rainy season due to (a) Imbibition (c) Osmosis (b) Endosmosis (d) Diffusion 5) The rate of transpiration will be more if the day is (a) Humid and windy (b) Hot, dry and windy (c) Hot and humid (d) Humid and cool (c) Define the following terms: (1) Vaccination (2) Natality (3) Population density (d) 1. 2. 3. 4. 5. (4) (5) Tonicity Photophosphorylation State the location and function of the following : (1) Urethra (4) (2) Medullary or myelin sheath (5) (3) Epididymis (e) (f) [5] [5] Spindle fibres Hypothalamus Give one point of difference between the following pairs on the basis of what is indicated in the brackets :1. Anaphase and Metaphase [structure of chromosome ] 2. Corpus callosum and corpus luteum [ function] 3. Antibiotic and antibody [source] 4. Addison s disease and Cushing s syndrome [cause and symptom] 5. Nucleotide and Nucleosome [components] [5] Given below is a table consisting of a set of items belonging to a common category. Complete the table by filling in the CATEGORY and the ODD TERM. [5] SET Henle s loop, PCT, Glomerulus, Bowman s Capsule NADPH, Glucose, Oxygen ATP Iodine, Carbolic acid, Cresol, Mercurochrome Urea, Ammonia, Uric Acid Creatinine Thymine, Guanine, Adenine, Cytosine, Thiamine g) (i) (ii) CATEGORY What do the following abbreviations stand for? (1) NICD (2) NADP (3) ODD TERM [3] RUBP Draw and label the diagram of a stomatal apparatus of a dicot leaf as it would appear during the day. Std.10/ 2010 2011 /2nd Term Examn../Sub : Biol./2 [2] h) Give the biological terms for the following : 1. 2. 3. 4. 5. [5] The lower limit of blood pressure. The process by which urine is expelled from the urinary bladder. The method of contraception which prevents implantation. The kind of cell without nuclear membrane. The type of blood circulation in the human body. SECTION B [Answer any four questions from this section] II. (a) The diagram given below shows part of the digestive system and blood vessels. Study the diagram and answer the questions that follow. [ Diagram ] 1) Label the blood vessels A, B and C. 2) What is the significance of blood vessel A? 3) Draw the cross section of blood vessel C and label the parts. 4) State the structural differences between blood vessel B and C. 5) Of the three blood vessels A ,B and C i) ii) iii) Which one contains maximum urea? Which one contains maximum glucose? Which one contains maximum oxygen? Std.10/ 2010 2011 /2nd Term Examn../Sub : Biol./3 [6] b. The diagram given below shows growth of embryo inside the uterus. Study the diagram and answer the questions that follow: [4] 1. Label the parts i and ii. 2. State the main difference between the sperm cell and the cells of the developing foetus. 3. What is gestation period? III. a) b) Answer the following . 1. State two functions of WHO and Red Cross. 2. What are the functions of Thyroxine? 3. Mention any two methods by which the plant tends to reduce transpiration. 4. Why is it advantageous to have a small family? 5. Name any two normal and abnormal constituents of urine. Give suitable explanation for the following: 1) 2) 3) 4) IV a. i) [6] [4] Deficiency of Mg ions can result in poor plant growth. Urination is more frequent in winter. Vasopressin is called antidiuretic hormone. Carbon monoxide poisoning may cause death. Draw the diagram of V.S. of human eye and label the parts concerned with following functions. Use the letter given in the brackets and the name to label the parts. [3] 1. 2. 3. 4. 5. 6. The part which regulates the amount of light entering the eye [A] The part which is responsible for changing the focal length of the lens.[B] The part which holds the lens in position [C] The layer which prevents internal reflection of light rays. [D] The fluid which keeps the lens moist. [E] The part which contains maximum cones. [F] Std.10/ 2010 2011 /2nd Term Examn../Sub : Biol./4 (ii) Name the three externally visible parts of the brain and state any one function of each part. [3] b) Complete the following diagram on the basis of differences between Mitosis and Meiosis as directed and answer the questions that follow. Number given in each cell represents the number of chromosomes. [4] Mitosis 16 i. ------------------------[draw the number of daughter cells with number of chromosomes] iii.---------------------------[ draw the diagram of daughter cells with number of chromosomes after second meiotic division ] Meiosis 16 ii.---------------------[ draw the diagram of daughter cells with number of chromosomes after first meiotic division] iv. Where does Mitosis occur in a plant? v. Where does Meiosis occur in a plant? V. Study the following experimental set up and answer the questions that follow : a) [5] Hydrogencarbonate indicator is purple in alkaline conditions, red in neutral conditions and yellow in acidic conditions. The pondweed was placed in hydrogencarbonate solution, which was red in colour when the tube was set up. The tube was left for five hours in bright light as shown in fig. a. i. ii. What colour you would observe in the tube after five hours in bright light? Give an explanation for this. One water shrimp was introduced into a similar tube with pondweed and the tube was placed in bright light for five hours as shown in fig.b. What colour you would observe in the tube after five hours in bright light? Give an explanation for this. Std.10/ 2010 2011 /2nd Term Examn../Sub : Biol./5 iii. Three water shrimps were introduced into a similar tube with pondweed and the tube was placed in bright light for five hours as shown in fig. c. What colour you would observe in the tube after five hours in bright light? Give an explanation for this. b) Answer the following questions. i. ii. VI a) [5] What first aid steps would you take in the case of snake bite and drowning? Describe an experiment to demonstrate that water is conducted through the xylem. Following diagrams show stages in the formation of a female gamete. Study the diagrams given below and answer the questions that follow. [5] 1. 2. 3. 4. 5. Name the structures a, b and d. Define the process which takes place in c. Name the four phases of menstrual cycle in the correct sequence. What happens to structure e , if fertilization occurs? Write in sequence, the regions which a mature sperm travels from the sperm producing cells of the testes up to the site of formation of zygote. 6. What are secondary sexual characteristics? b) Redraw the outline of the human body and place the following endocrine glands in their correct location and answer the questions that follow. [5] 1) i) ii) iii) iv) Pituitary gland Thyroid gland Adrenal gland Pancreas 2) What are tropic hormones? Name any such hormone and state its function. 3) Compare the functions of insulin and glucagon. ********* Std.10/ 2010 2011 /2nd Term Examn../Sub : Biol./6

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