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CARMEL SCHOOL DHANBAD FIRST TERMINAL EXAMINATION- 2020 STD-X SUBJECT- BIOLOGY F.M-80 Time-2 hrs NAME: ___________________ CLASS: __________ SEC: __________ ROLL NO. ____________ NOTE: 1. Send your Answer Sheet on this number only 7209851449 2. Don t send multiple pdf. files. (Only 1 pdf allowed for 1 student) 3. Don t send text messages and photos. 4. Write correct question no. and answer your exams. --------------------------------------------------------------------------------------------------Section I (40 marks) (Answer all the questions) [Read the instructions carefully] Question 1. a) Name the following: (Do not copy the questions) i) Pressure of the cell content on cell wall. ii) The organism on which Mendel had worked. iii) The structure through which guttation takes place. iv) The kind of cell division which occur in pollen grains. v) The fluid that transports fatty acid and glycerol. [5] b) The following statements are wrong. Rewrite the correct statement by changing the word/words written in bold letters. [5] i) New RBCs are produced in heart. ii) Voltmeter is the instrument used for measuring the rate of transpiration in green plants. iii) The escape of plant-sap from the cut surface is called guttation. iv) Moist cobalt chloride paper is blue in colour. v) Renal vein contains more urea than renal artery. c) Complete the following pairs to represent the relationship between the structure and special functional activity. (Copy the questions) [5] i) Guard cells and _____________ ii) Chromosomes and ______________ iii) Root hair and ______________ iv) Glomerulus and _____________ v) Lenticels and ________________ d) Complete the following: (Do not copy the question) i) ii) iii) iv) v) [5] The U shaped part of nephron is __________ Replication of DNA occurs in the __________ of interphase. The root hair is the extension of ____________. The region of the attachment of chromosomes to spindle fibre is ________. A character that is not suppressed is ____________. e) The diagram given is a schematic representation of the circulatory system in man. Study the diagram carefully and answer the questions that follow: i) ii) iii) Label the parts 1 to 4 indicated in the diagram. [2] Give one difference between the parts 1 and 2 based on: (a) their structure (b) the nature of blood flowing through them. [2] What is the specific name of the type of circulation that takes place between the heart and the lungs? [1] f) Differentiate between the following on the basis of what is given in the bracket: [5] i) ii) iii) iv) v) Phenotype and genotype (definition) Lymphocyte and Neutrophils (function) Autosomes and sex chromosome (number in humans) Cytokinesis and karyokinesis (definition) Bicuspid valve and tricuspid valve (location) g) Define: Allele, Mutation, Bleeding, Plasmolysis, Pericardium. [5] h) Given below are five groups of five terms in each. Arrange the terms in each group in their proper sequence. [5] i) ii) iii) iv) v) Dorsal aorta, Posterior vena cava, Hepatic vein, Hepatic artery, Left ventricle. Pulmonary artery, Pulmonary vein, Lungs, Right ventricle, Left auricle. Renal artery, renal vein, Kidney, Dorsal aorta, Vena cava. Root hair, Soil water, Stem xylem, Root Xylem, Cortex. Mesophyll cells, leaf xylem, inter cellular space, stoma, sub stomatal space SECTION II (40 Marks) (Answer all the questions) [Read the instructions carefully] Question 2. a) Study the given diagram and answer the questions that follow: i) ii) iii) iv) v) Name the parts labelled 1 and 2. Give the main function of each of the parts 1and 2. Name the blood vessel shown inA. Write any one characteristic of A. Identify the phenomenon occurring in A. Name the process occurring in B and C. [1] [1] [1] [1] [1] b) The apparatus shown below was set up for an experiment. After sometime there was a rise in the level of the liquid in vertical tube of Thistle funnel. Observe the diagram and answer the questions that follow: i) ii) iii) iv) Name and explain the process demonstrated. [1] Name two liquids (A and B) that could be used in the experiment. [1] Why did the level of liquid in the vertical tube rise? [1] Give one example in plants in which the above process occurs and what is the advantage of this to the plant? [2] Question 3. (a) The diagram given below shows a section of human kidney. Study the diagram carefully and answer the questions that follow: i) ii) iii) iv) Label the parts numbered 1 to 4. Why does the part 1 have dotted and part 2 have stripped appearance? What is the fluid that passes down part 4? Mention the structural and functional unit of kidney. [2] [2] [1/2 ] [1/2] (b) Given below is an experimental set up to demonstrate a particular process. Study the same and answer the questions that follow: i) ii) iii) iv) Name and explain the physiological process being studied. [1] What is the aim of the above experiment? [1] What would you observe in both the surfaces of leaf after an hour? Give reason in support of your answer. [2] Mention any one adaptation found in plants to overcome the physiological process mentioned in (i) above. [1] Question 4. a) In a certain species of animals black fur (B) is dominant over brown fur (b). Predict a genotype and phenotype of the offspring when both the parents are Bb or heterozygous black fur. [3] b) Draw the diagram of Metaphase stage of mitosis in plant cell with 6 chromosomes. (Label centromere, spindle fibre and chromatids). [3] c) State Mendel s law of Independent Assortment. [1] d) Find the progeny of a marriage between a colour blind man and a carrier woman. [2] e) Normally only male child suffers from colour blindness. Explain. [1] Question 5. (a) Given below is the diagram representing a stage during mitotic cell division in an animal cell.Study the same and answer the questions that follow: (i) Identify the stage. Give reason in support of your answer. [1] (ii) Name the parts labelled 1, 2 and 3 [1 ] (iii) Name the stage that follows this stage of mitosis. How can this stage be identified? [1] (iv) Mention one difference between mitosis and meiosis. [1] (v) Name the kind of cell division occurs in the root tip of plants. [1/2] b) Give reasons: [5] i) Blood flowing away from the stomach and intestine is put into circulation via the liver and not directly. ii) Most leaves have upper surface more green. iii) If you sprinkle some common salt on grass growing on a lawn, it is killed at that spot. iv) In summer the urine is slightly thicker than winter. v) Some plants show wilting of their leaves during midday even when the soil is well watered. *******************************************************
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