MC 17 B SECTION I (40 Marks) Attempt all questions from this section.

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1 MC 17 B - 11 SECTION I (40 Marks) Attempt all questions from this section. Question 1 (a) Name the following. (i) The part of the female reproductive system where development of foetus is completed. (ii) Absorption of water by dead plant cells by surface attraction. (iii) The type of WBC that produce antibodies. (iv) Abnormally increase in the number of white blood cells. (v) The valve present in the opening of right ventricle into pulmonary artery. (c) (d) State the main function of the following. (i) Iris (ii) Myelin sheath (iii) Lacrimal gland (iv) Prostate gland (v) Interstitial cells Copy and complete the following by filling the blanks 1 to 5 with appropriate words. In a nephron, the blood flows through the (1) under great pressure. The reason for this great pressure is that the (2a) (outgoing) arteriole is narrower than the (2b) (incoming). This high pressure causes the (3) part of the blood to filter out from the (4) into the (5) capsule. Match the items given in column A with the most appropriate ones in column B and rewrite the correct matching pairs. Column A Column B (i) Prolactin (a) transmits impulse from spinal cord to muscle. (ii) Sacculus associated with dynamic body balance. (iii) Afferent nerve (c) development of secondary sexual characters. (iv) Stroma (d) site of light reaction. (v) Pacemaker (e) SA node (f) AV node (g) site of dark reaction (h) stimulate production of milk by mammary gland. (i) associated with static body balance. (j) transmit impulses from receptor organ to spinal cord. MC 17 B

(e) The figure given below represents an experiment setup, to study the importance of a factor in photosynthesis. Study the same and answer the following questions.

2 (e) The figure given below represents an experiment setup, to study the importance of a factor in photosynthesis. Study the same and answer the following questions. Black paper (i) Name the factor being studied in this experiment. (ii) Why was the plant kept in a dark room before conducting the experiment? (iii) Why was the experimental leaf kept in: a) boiling water b) boiled in methylated spirit (iv) Name the solution used to test the presence of starch in the rest of the leaf. (v) What will we observe in the experimental leaf at the end of the starch test? (f) Mark the odd items in each and state the category of the rest : (i) Myopia, hypermetropia, astigmatism, aqueous humour. (ii) Vestibule, utriculus, ear ossicles, semicircular canals. (iii) Epididymis, testis, prostate gland, fallopian tube. (iv) Gene, chromosomes, nucleosome, lysosomes. (v) Glucocorticoid, testosterone, oxytocin, mineralocorticoid. (g) Give the exact location of the following structures : (i) Pituitary gland (ii) Hydathodes (iii) Mitral valve (v) Thyroid gland (iv) Ampulla (h) Differentiate between the following : (i) Demography and Population density. (ii) Active immunity and Passive Immunity. (iii) Natality and Mortality. (iv) Fraternal twins and Identical twins. (v) Cataract and Presbyopia. SECTION II (40 Marks) Attempt any four questions from this section. Question 2 (a) Figure A shows a diagram of a part of cross section of a root. Study the same and answer the following questions MC 17 B - 11

(i) Name the parts indicated by guidelines 1 to 4. (ii) Is the root hair unicellular or multicellular? (iii) What pressure is responsible for movement of water? (iv) How is the pressure developed?

3 (i) Name the parts indicated by guidelines 1 to 4. (ii) Is the root hair unicellular or multicellular? (iii) What pressure is responsible for movement of water? (iv) How is the pressure developed? (v) Draw a neat labelled sketch of the root hair cell as it would appear if some strong fertilizer is added to the soil close to it. Account for the following : (i) Wilted lettuce leaves become turgid when placed in cold water. (ii) One feels blinded for a short time while coming out of a dark room. (iii) Gametes have haploid number of chromosomes. (iv) Throat infection can lead to ear infection. (v) The left ventricle has thicker walls than right ventricle. Question 3 (a) Diagram B shows a certain structure found in a leaf. Study it carefully and answer the following : (i) Name the parts labelled A and B. (ii) What is the function of A and B. (iii) Mention 2 structural features of A which helps it to perform its function. (iv) Where is this structure likely to be found in a leaf? (v) How many other cells are found surrounding this structure as seen in the diagram? Complete the following table by filling in the blanks numbered 1 to 10 : Gland Hormone secreted Function 1 2 Regulate basai metaboism Pancreas ( cells) Increases heart beat 7 Oxytocin Regulate mineral metabolism Question 4 (a) Diagram C shows a lateral section of a testis of a man. Study the same and answer the questions : MC 17 B

1 2 3 4 (i) Label the parts 1 to 4. (ii) Describe the functions of parts labeled 1 and 3. (iii) What is the significance of the testes being located in the scrotal sac outside the abdomen?

4 (i) Label the parts 1 to 4. (ii) Describe the functions of parts labeled 1 and 3. (iii) What is the significance of the testes being located in the scrotal sac outside the abdomen? (iv) What is the role played by the inguinal canal? (v) What is semen? Answer the following in brief. (i) Any two functions of amniotic fluid. (ii) Differentiate between implantation and gestation. (iii) What happens to the uterus if fertilization fails to take place? (iv) What is the function of acrosome of the sperm? (v) What is corpus luteum? What is its function? Question 5 (a) Draw a neat labelled sketch of vertical section of human eye. (c) Give technical terms for the following: (i) The cells of retina which can differentiate colours. (ii) The fluid present in the anterior part of the eye in front of the eye lens. (iii) The layer of the eyeball which prevents reflection of light. (iv) An eye defect in which the cornea becomes uneven. (v) The structure which holds the lens in proper position. (vi) The sensory cells in cochlea that convert vibration into nerve impulse. What is the cause of myopia? How can this disorder be corrected? [3] [2] Question 6 (a) (i) Draw and label the anaphase stage of mitosis in a plant cell having 2n=4. (ii) Write the features of stage telophase in an animal cell. [3] [2] 168 MC 17 B - 11

5 Explain the following terms : (i) Mutation (ii) Phenotype (iii) Sex-Linked disease (iv) Synapsis (v) Plasmolysis Question 7 (a) Figure D shows a certain system in human body. Study it carefully and answer the following questions : C B A D (i) Name the system. (ii) Label the parts A, B, C, D. (iii) Part B has undergone a surgical operation. Name the process and its purpose. (iv) An equivalent method can be applied on man. Name and explain it. (i) Explain IUD. (ii) Write two structural differences between an artery and a vein. (iii) Draw the structure of a human sperm and label the parts. (iv) Write three aspects of family welfare. MC 17 B

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.