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ICSE Class 8 Prelims 2018 : Biology (Vibgyor High School, Pune (Balewadi))

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Vibgyor High School, Pune (Balewadi)

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VIBGYOR High First Term Examination 2017-2018 BIOLOGY Grade: VIII Max. Marks: 80 Date: 13/10/2017 Time Allowed: 2 hours Instructions: Answers to this paper must be written on the paper provided separately. You will not be allowed to write during the first 15 min. 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. Attempt all question from Section A and any 4 question from Section B. All working, including rough work, must be clearly shown and must be done on the same sheet as the rest of the answer. Omission of essential working will result in loss of marks The intended marks for question or parts of question are given in brackets [] Mathematical tables are provided. ______________________________________________________________________ SECTION A(40 marks) (ATTEMPT ALL QUESTIONS IN THIS SECTION) Question 1 A) Name the following:- [5] (i) Thin walled blood vessels which carry deoxygenated blood. (ii) The large number of fine outgrowths present on lateral roots which increase the surface area of absorption. (iii) Any change in the environment that results in activity of the body. (iv) The fight or flight hormone. (v) The common asexual method of reproduction in single celled organisms. Page 1 of 9 B) State whether the following are true or false. If false, rewrite the correct form of the statement by changing the first/last word only: [5] (i) White blood cells are also called erythrocytes. (ii) Response is the activity of the body due to the stimulus. (iii) Diabetes is caused due to insufficient secretion of thyroxine. (iv) Sperms are produced in epididymis. (v) Animals domesticated for food or work are called pets. C) Match the items Column I with those in Column II Column I [5] Column II (i) Thrombocytes (a) Male hormone (ii) Fish farming (b) Growth hormone (iii) Testosterone (c) Arise from brain (iv) Pituitary (d) Platelets (v) Cranial nerves (e) Pisciculture D) Choose the odd one out: [5] (i) Right auricle, Left auricle, Liver, Right ventricle (ii) Diffusion, Osmosis, Active transport, Evaporation (iii) Zygote, Budding, Binary fission, Regeneration (iv) Goitre, Cretinism, Myxoedema, Diabetes (v) Murrah, Mehsana, Surti, White leghorn Page 2 of 9 E) Answer the following questions based on the diagram given below: [5] a) b) c) (i) Identify the system related to above diagram of the human body. (ii) Label the part a state its function. (iii) Identify part b and state the function. (iv) Labelpart c . (v) Where does the blood go from part c ? F) Choose the correct alternative from the choices given: (i) Pulmonary vein carries (1) Oxygenated blood (2) Deoxygenated blood (3) Glucose rich blood (4) CO2 laden blood (ii) Medulla oblongata controls (1) Smelling (2) Beating of heart and respiratory movement (3) Intelligence and will power (4) Balancing the body Page 3 of 9 [5] (iii) Which one of the following converts excess of glucose into glycogen (1) Glucagon (2) Thyroxine (3) Insulin (4) Adrenaline (iv) Internally, the uterus opens into: (1) Urethra (2) Vagina (3) Oviduct (4) Vulva (v) Which one of the following is a bacterial disease of cattle in which the animal gets swelling on body parts, especially on the neck? (1) Cow pox (2) Anthrax (3) Salmonellosis (4) Rinderpest G) Rearrange and rewrite in a logical sequence: [5] (i) Lungs, Right auricle, Left auricle, Right ventricle, Left ventricle (ii) Stimulus, Effector, Impulse, Response, Receptor (iii) Child, Adolescent, Infant, Adult (iv) Adult, Eggs, Pupa, Larva (v) Zygote, Fertilization, Cell division, Embryo H) State the functions of the following: (i) Fallopian tube (ii) Thyroxine Page 4 of 9 [5] (iii) Xylem vessels (iv) Sensory nerve (v) Haemoglobin SECTION B (40 marks) (ATTEMPT ANY FOUR QUESTIONS IN THIS SECTION) Question 2 A) Observe the given diagram and answer the questions. [5] a b c d (i) Identify the system shown in above diagram. (ii) Label part a and state its function. (iii) Identify part b and state the hormone secreted by it. (iv) What is the role of d ? (v) Label the part c and state its location and structure. Page 5 of 9 B) Differentiate between the following pairs on the basis of what is given in the brackets (Differences should be written in 2 columns) (i) [5] Cerebellum and medulla oblongata ( Functions ) (ii) Arteries and veins ( Type of blood carried ) (iii) Xylem and phloem ( Type of cells ) (iv) Exocrine gland and endocrine gland ( Function ) (v) Adolescence in boys and adolescence in girls ( physical changes ) Question 3 A) Answer in short [5] (i) Define diffusion. (ii) State any two functions of nervous system. (iii) Name the method of reproduction in hydra. (iv) Which hormone stimulates thyroid gland to secrete thyroxine? (v) What are the two main types of substances in cattle feed? B) Answer the following briefly - [5] (i) Discuss the disorders caused due to under secretion of thyroxine. (ii) Describe the female reproductive system in human beings. (iii) [2] ( Diagram not needed ) [2] Enlist the symptoms of sick cattle. [1] Page 6 of 9 Question 4 A) Study the diagram and answer the questions: [5] a) b) c) d) (i) Identify the structure of a given diagram. [1] (ii) Label the Part a and Part b . Write down their functions. [2] (iii) Identify part c and d and explain them. [2] B) (i) Draw a neat well labelled diagram of structure of a nerve cell. [3] (ii) Define nerve. Explain three types of nerves. [2] Question 5 A) Observe the diagram and answer the question that follows: Page 7 of 9 [5] (i) What is the aim of the experiment ?State your observation. [1] (ii) Define the transpiration. Explain its importance in plants. [2] (iii) Discuss the factors affecting the rate of transpiration. [2] B) Explain the terms [5] (i) Blood pressure(ii) ANS(iii)Adolescence(iv) Fertilization(v)SericultureQuestion 6 A) Give the biological term [5] (i) The instrument used to measure the blood pressure. (ii) The chickens reared for obtaining meat. (iii) The full term of the development of an embryo in the uterus . (iv) The female sex hormone. (v) The part of brain which is the seat of intelligence, consciousness and will power. B) (i) Draw a well labelled diagram of human male reproductive system. (ii) Name the following- [2] [2] a. The part of male reproductive system where sperms are produced. b. A milky white fluid which is a mixture of sperms and secretions from glands. (iii) State the role of secretion from seminal vesicles. Page 8 of 9 [1] Question -7 A) (i) Study the diagram below and answer the following questions. [5] a d b ee c (i) Identify the type of circulation shown in above diagram. Name the part a . [1] (ii) Discuss the two types of circulation. [2] (iii) Label the parts b,c,d,e [2] B) Give reasons for the following- [5] (i) Personal hygiene plays important role in maintaining health during adolescence. [2] (ii) In males, the scrotal sacs are present outside the abdominal cavity. [2] (iii) Shelters of milch animals have sloping floors. [1] Page 9 of 9

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