Formatting page ...
PROGRESSIVE EDUCATION SCHOOL th Grade 10 Biology Paper-III Marks 80 SECTION I (40 Marks) Attempt all questions from this Section Question 1 A. Name the following: [5] (i). The hormone that regulates the basal metabolic rate. (ii). The part of the internal ear related to the static balance of the body. (iii). The soluble protein in blood plasma responsible for blood clotting. (iv). A plant having sunken stomata. (v). The uptake of mineral ions against the concentration gradient. B. State whether the following statements are true or false. If false, rewrite the correct form of the statement by changing the first word only: [5] (i). Cones are photoreceptor cells that are sensitive to dim light. (ii) The Beta cells of the pancreas secrete insulin. (iii). Plasmolysis makes the cell turgid. (iv). Guttation is the loss of water in the form of water droplets from hydathodes. (v). Nephrons are the basic unit of the brain. C. The following paragraph is related to absorption of water from the soil. Complete the following [5] paragraph by selecting the correct word from those given below. You may use a term only once. Exostosis, Hypertonic, Osmosis, Isotonic, Hypotonic, Cortical, Endosmosis, Phloem. Water enters the root hair from the soil by the process of....................(i). This is because the solution in the soil is ............................. (ii) whereas the cell sap in the root hair cell is .................... (iii) The water then passes through the.............................(iv) cells by cell to cell ......................... (v) and reaches the xylem of the root. D. Give the exact location of each of the following structures: [5] (i) Corpus callosum (ii) Adrenal gland (iii) Chromosomes (iv) Stomata (v) Conjunctiva E. Given below are sets of five terms each. Rewrite the terms in correct order in a logical sequence. [5] Example: Large intestine, Stomach, Mouth, Small intestine, Oesophagus. (i) (ii) (iii) (iv) (v) Fibrin, Platelets, Thromboplastin, Fibrinogen, Thrombin. Cochlea, Malleus, Pinna, Stapes, Incus. Receptor, Spinal cord, Effector, Motor neuron, Sensory neuron. Karyokinesis, S-phase, cytokinesis, G1 phase, G2 phase (cell cycle). Atria, Ventricles, Arteries, Veins F. The diagram given below represents the location and structure of an endocrine gland. Study the same and answer the questions that follow: [5] (i) (ii) (iii) (iv) (v) Name the endocrine gland shown in the diagram. Name the secretion of the gland which regulates basal metabolism. Name the mineral element required for the synthesis of the above mentioned hormone. Name the disease caused due to under secretion of the above mentioned hormone in children. Name the disease caused due to hypersecretion of the above mentioned hormone. G. Differentiate between the following pairs on the basis of what is mentioned in brackets : (i) Active Transport and Diffusion [Significance in plants] (ii) Vasopressin and Insulin (Deficiency disorder) (iii) Rods and Cones of Retina (Type of pigment) (iv) Renal cortex and Renal medulla [Parts of the nephron present] (v) NADP and ATP [Expand the abbreviation] [5] H. Given below is an apparatus used to study a particular process in plants. Study the same and answer the questions that follow: [5] (i) (ii) (iii) (iv) (v) Name the apparatus. Mention one limitation of this apparatus. Which phenomenon is studied with the help of this apparatus? What is the function of the part marked reservoir? What is the role of the air bubble in the experiment? SECTION II (40 Marks) Attempt any four questions from this Section Question 2 a). Given one difference between each of the following pairs on the basis of what is given in the brackets: [5] (i) Mitral valve and Aortic semilunar valve [location] (ii) Simple goiter and exophthalmic goiter. (Cause of the disorder) (iii) Metaphase and Anaphase [Position of chromatids] (iv) Parasympathetic nervous system & Sympathetic nervous system (Function) (v) Turgid cell and Plasmolysed cell [Tonicity of the surrounding solution] b). Given below is the figure of an experimental set up to demonstrate root pressure. (i) Define root pressure. [5] (ii) What change would you observe in the water level after sometime? (iii) What role is being played by the root pressure in the given experiment? (iv) Why the oil has been sprinkled on water? Question 3 a). Given below is a diagram representing a stage during mitotic cell division. Study it carefully and answer the questions that follow: [5] (i) Is it a plant cell or an animal cell? Give a reason to support your answer. (ii) Identify the stage shown. (iii) Name the stage that follows the one shown here. How is that stage identified? (iv) How will you differentiate between mitosis and meiosis on the basis of the chromosome number in the daughter cells? (v). Why meiosis cell division is important for our body? b). The diagram given below shows the internal structure of the spinal cord, depicting a simple reflex. Study the same and then answer the questions that follow: [5] (i) Name the parts numbered 1 to 5. (ii) Using the letters of the alphabet shown in the figure indicate the direction in which an impulse enters and leaves the spinal cord. (iii) What is the term given to the point of contact between two nerve cells? (iv) What is meant by simple reflex ? Give two examples of simple reflexes and name the stimuli too. (v) How does the arrangement of nerve cells in the spinal cord differ from that in the brain? Question 4 a). Given below is a diagrammatic representation of a defect of the human eye which has been corrected using a suitable lens. Study the diagram and answer the questions that follow: [5] (i) Identify the defect that has been corrected. (ii) Mention two reasons for the above defect. (iii) Label the parts numbered 1 to 4. (iv) State the functions of the parts numbered 3 and 4. (v) What maintains the shape of the eyeball? b). The diagram shows the Excretory System of a Human being. Study the same and then answer the questions that follow: [5] (i) Name the parts labeled 1, 2,3, and 4. (ii) Give the main function of the parts labeled 5,6, 7 and 8. (iii) Name the endocrine gland which could be added in diagram and state its location/position. Question 5 a). The diagram given below represents a section of the human heart. Answer the questions that follow: (i) Which parts of heart are in the diastolic phase? Give a reason to support your answer. (ii) Label the parts numbered 1 and 2 in the diagram. What type of blood flows through them? (iii) What causes the heart sounds LUBB and DUP ? (iv) Name the blood vessels that supply oxygenated blood to the heart muscles. (v) Draw neat labelled diagrams of a cross section of an artery and a vein. [5] b). [5] (i) Identify the above diagram. (ii) Label the guidelines 1-3. (iii) Name the phenomenon which takes place in the above diagram. (iv) Define the phenomenon. (v) What is the importance of the above phenomenon? Question 6 a). Given below is a simple diagram of the human kidney cut open longitudinally. Answer the following questions: [5] (i) Give the definition of excretion. (ii) Name the units of the kidney. (iii) Why does the cortex of the kidney show a dotted appearance? (iv) Mention two functions of the kidney. (v) Write two differences in the composition of the blood flowing through blood vessels A and B. b). Give reason for the following: - [5] i). We gargle with saline water in case of throat infection. ii). Glucose absent in the urine of a healthy person iii). Forest bring in the rain, transpiration is the cause. Explain why. iv). Bacteria and fungi do not grow in pickles, jams, jellies and squashes, etc v). ATP is needed for dark reaction. Question 7 a). A candidate in order to study the process of osmosis has taken 3 potato cubes and put them in 3 different beakers containing 3 different solutions. After 24 hours, in the first beaker the potato cube increased in size, in the second beaker the potato cube decreased in size and in the third beaker there was no change in the size of the potato cube. The following diagram shows the result of the same experiment: [5] (i) Give the technical terms of the solutions used in beakers, 1,2 and 3. (ii) In beaker 3 the size of the potato cube remains the same. Explain the reason in brief. (iii) Write the specific feature of the cell sap of root hairs which helps in absorption of water. (iv) What is osmosis? (v) How does a cell wall and a cell membrane differ in their permeability? b). Complete the following table by filling in the numbered blanks with an appropriate term/answer: [5] -----XX-----
|
