MAHESH TUTORIALS I.C.S.E.

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1 MAHESH TUTORIALS I.C.S.E. GRADE - X ( ) Exam No. : MT/ICSE/SEMI PRELIM - II-SET - B 018 Absorption by Roots, Transpiration, Excretory system, Nervous system, Sense Organs, Reproductive system, Human Evolution, Population. BIOLOGY SCIENCE PAPER - 3 (2 hours) Answers to this Paper must be written on the paper provided separately. You will not be allowed to write during the first l5 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. Attempt all questions from Section I and any four questions from Section II. The intended marks for questions or parts of questions are given in brackets [ ]. SECTION A (40 Marks) Attempt all questions from this section. Question 1 (A) Choose the correct answer from the options given below: [5] 1. The finger-like projections near the ovary of female reproductive system are (a) Ostia (b) Oviduct (c) fimbrae (d) follicle 2. The number of spinal nerves is a human being are: (a) 31 pairs (b) 10 pairs (c) 21 pairs (d) 30 pairs 3. Drooping of leaves of Mimosa plant is due to. (a) change in turgor pressure (b) plasmolysis (c) imbibition (d) diffusion 4. The leaves of have a cuticular wax. (a) conifers (b) xerophytes (c) aquatic plants (d) climbers 5. A Malpighian capsule includes. (a) Bowman's capsule (b) glomerulus (c) loop of Henle (d) Bowman's capsule and glomerulus Copyright reserved. This Paper consists of 5 printed pages.

2 (B) Name the following: [5] 1. The statistical study of human population. 2. The area of best vision in eye. 3. Shrinkage of protoplasm when a cell is kept in a hypertonic solution. 4. The kind of twins formed from two fertilised eggs. 5. The accessory gland in human males whose secretion activates the sperms. (C) Match the items given in Column A with those of Column B: [5] Column A Column B 1. Injured part of the plant a. Prognathus face 2. Darwinism b. Use and disuse 3. High rate of transpiration c. Overproduction 4. Australopithecus d. Exudation 5. Lamarkism e. Maize plant f. Pre human ancestor (D) State whether the following statements are true or false, If false rewrite the correct statement changing the underlined word. [5] 1. Rapidly growing industries favoured population rise. 2. Bark of a tree helps in preventing loss of water. 3. Root hair is extension of cortical cell. 4. Glucose is reabsorbed in the nephron by osmosis. 5. Leucopenia is the decrease in the number of RBCs in the blood. (E) Put the order in sequence: [5] 1. Dorsal root ganglion, receptor, effector, ventral root ganglion, associated neuron. 2. Homo erectus, Homo sapien, Australopithecus, Ramapithecus, Cro-magnon man. 3. Renal artery, urethra, ureter, kidney, urinary bladder. 4. Cochlea, tympanum, auditory canal, ear ossicles, oval window. 5. Stomata, ascent of sap, sub-stomatal space, intercellular spaces, mesophyll cells. (F) Draw a neat labelled diagram of frontal view of male reproductive system. Label the parts :Testis, Epididymis, Vas deferens, Prostate gland, Urethra, Penis [5] (G) Explain the following : [5] 1. Evolution 2. Gestation 3. Copulation 4. Haematuria 5. Mortality

Question 2 (A) (i) Enlist 3 main reasons for sharp rise in World Human Population in the recent past. [3] (ii) (a) Write the full form of MTP.

3 (H) Choose the ODD one out of the following stating appropriate reasons: [5] 1. Condom, Diaphragms, Sperm-killing agents, Tubectomy. 2. Sneezing, coughing, blinking, typing. 3. Ammonia, urea, uric acid, faeces. 4. Cellophane paper, egg membrane, animal bladder, plastic sheath. 5. Sweat, bile, tears, saliva. SECTION B (40 Marks) Attempt any four questions from this section. Question 2 (A) (i) Enlist 3 main reasons for sharp rise in World Human Population in the recent past. [3] (ii) (a) Write the full form of MTP. [1] (b) Name two surgical techniques that can be used to prevent pregnancy? [1] (B) Look at the picture given below and answer the questions that follow. (a) Which theory does the given picture support? (b) Who gave this theory? (c) Define the theory named in (a). (d) Name the two principles of this theory. (e) What is scientific name of peppered month? Which phenomenon of natural selection does it indicate. [5] Question 3 (A) The diagram below is a part of the T.S. of root. Study the same and answer the questions that follow : [5] 5 A 2 A

4 (a) Draw a labeled diagram of the root hair cell as it would appear if some fertilizers are added to the soil close to it. (b) Is the root hair unicellular or multi cellular? (c) Name the process responsible for the entry of water molecules from the soil into A 1 and then is to A 2. (d) What pressure is responsible for the movement of water in the direction indicated by arrows? (e) How is this pressure set up? (B) (i) Give three adaptations how plants reduce transpiration by a plant. [3] (ii) Transpiration is a price plant pays for photosynthesis. Give Reasons. [2] Question 4 (A) (i) Define adaptation. [1] (ii) Explain the major changes occuring in eye during light and dark. adaptation. [4] (B) Give the characteristics of Cro-magnon man. [3] (C) Draw a well-labelled diagram of Malpighian corpuscle. [2] Question 5 (A) Given alongside is a diagram depicting a defect of the human eye. Study the same and then answer the questions that follow: [5] (i) Identify the defect. 1 4 (ii) Name the parts labelled 1, 2 and 3. (iii) Give two possible reasons for this 2 eye defect. (iv) Draw a labelled diagram to show how the above mentioned defect is 3 rectified. (B) Given below is an apparatus used to study a particular process in plants. Study the same and answer the questions that follow : [5]

5 (i) Name the apparatus. (ii) Mention one limitation of this apparatus. (iii) Which phenomenon is studied with the help of this apparatus? (iv) What is the function of the part marked 'reservoir'? (v) What is the role of the air bubble in the experiment? Question 6 (A) The diagram below shows two reproductive cells A and B. Answer the following questions based on the diagram. [5] (i) Name the reproductive cells A and B. (ii) Where in the reproductive system are the above cells are produced. (iii) Where in the female reproductive system do these cells unite? (iv) Name the main hormones secreted by (1) ovary (v) (2)testes. Name an accessory gland found in the male reproductive system. (B) (i) What do you mean by Tubular secretion? [2] (ii) What is diuresis? Give examples of diuretics. [2] (iii) What is inguinal canal? [1] Question 7 Answer the following Questions : (i) Explain Follicular phase of Menstrual cycle. [2] (ii) Your mouth begins to water (salvation) at the sight of tasty food. Give Reasons. [2] (iii) What are the functions of Thalamus and Hypothalamus? [2] (iv) The wooden doors of houses get jammed in rainy seasons. Say why? [2] (v) How many membranes protect the brain? Give their names. [2] All the Best

MAHESH TUTORIALS I.C.S.E.

ICSE X MAHESH TUTORIALS I.C.S.E. SUBJECT : BIOLOGY Question 1 (a) Name the following : (i) (ii) (iii) (iv) SECTION - A (40 marks) (Attempt all questions from this section) The cell body of a nerve cell.