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ICSE Class X Prelims 2023 : Biology (The Future Foundation School (TFFS), Kolkata)

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THE FUTURE FOUNDATION SCHOOL PRE BOARD EXAMINATION SESSION 2022 2023 BIOLOGY SCIENCE Paper 3 (Two hours) (Maximum Marks : 80) CLASS X DATE 03.01.23. Answers to this Paper must be written on the paper provided separately. You will not be allowed to write during the first 15 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. _____________________________________________________________________________ Section A is compulsory. Attempt any four questions from Section B. The intended marks for questions or parts of questions are given in brackets [ ]. _____________________________________________________________________________ SECTION A (Attempt all questions from this Section) Question 1. Select the correct answers to the questions from the given options: [15] (i) A pair of corresponding chromosomes of the same shape and size but one from each parent. (a) Autosomes (b) Sex chromosomes (c) Homologous chromosomes (d) Analogous chromosomes (ii) The solvent used to dissolve the chlorophyll pigment while testing a leaf for starch. (a) Soda Lime (b) Carbolic acid (c) Methylated spirit (d) Water (iii) Wooden doors swell up during the rainy season due to______________. (a) Osmosis (b) Diffusion (c) Imbibition (d) Transpiration (iv) A plant with variegated leaves is__________________. (a) Coleus (b) Lotus (c) Peepal (d) Mango (v) The pressure exerted by the cell contents on the cell wall: (a) Turgor pressure (b) Partial pressure (c) Wall pressure This Paper consists of 7 printed pages and 1 blank page. 2022 Turn over (d) Osmotic pressure. (vi) Exact location of root hair: (a) Extension of the cortex (b) Extension of epithelium (c) Extension epidermis (d) Extension of endodermis (vii) One of the examples of radiation pollution is: (a) Sulphur dioxide (b) Ozone (c) Iodine -131 (d) Discarded fused bulb (viii) Muscular wall is absent in: (a) Vein (b) Artery (c) Capillaries (d) Venules (ix) Normal gestation period is about: (a) 300 days (b) 280 days (c) 260 days (d) 240 days (x) The middle piece of the sperm provides: (a) Energy (b) Gene (c) Food (d) Chromosomes (xi) The secretion of hormones is considered to be extremely essential as it renders support in: (a) (b) (c) (d) (xii) Controlling body activities Regulating blood pressure Minimising diabetes level All of the above The primary role of adrenaline hormone is to organise the body in such a manner so that it is capable of facing any accidental situation for: (a) (b) (c) (d) Withdrawal Oppose Stepping back Fight or flight (xiii) The maturation of sperms is hindered , when the temperature within the body seems to be moderately (a) Lower (b) Average (c) Higher (d) Void (xiv) Which one of the following cells performs an important role in the sphere of 2 2022 producing testosterone? (a) Leydig cells (b) Sertoli cells (c) Nerve cells (d) Epithelial cells (xv) There are three concentric layers which contribute to the composition of the wall of the eyeball . What are the three concentric layers ? (a) Outer sclerotic , middle choroid and inner retina (b) Inner retina , middle choroid and eyelids (c) Outer sclerotic, tear ducts and orbits (d) Lacrimal sac , Lysozyme and lubricant Question 2. Name the followings: (i) (a) (b) (c) (d) (e) [5] The mineral element essential for the clotting of blood. The statistical study of the human population of a region. The nutritive layer of the eye which also prevents reflection of light. The structural and functional unit of the kidney. That part of the chloroplast where the light reaction of photosynthesis takes place. (ii) Given below are five sets of five terms each. In each case, rewrite the terms in logical sequences as directed at the end of each statement: (a) Vagina, Ovary, Uterus, Oviduct, Cervix (pathway of egg after ovulation) (b) Motor Neuron, Receptor, Sensory Neuron, Effector, Association Neuron. (pathway of a nerve impulse) (c) Pupil, Yellow Spot, Cornea, Lens, Aqueous humour (path of entry of light into the eye from an object) (d) Stoma, Mesophyll cells, Xylem, Substomatal space, Intercellular space, (loss of water due to transpiration) (e) Cortical cells, root hair, soil water, endodermis, xylem. (entry of water into the plant from the soil) [5] (iii) There are five sets consisting of five terms given below. In each set there is a word which is an odd one. For each of these sets write down the category of the group having identified the odd one out: (a) Blinking, Knitting without looking, Smiling, Blushing, Crying. (b) Myopia, Cataract, Hypermetropia, Squint, Cretinism. (c) Cowper s gland, Urethral gland, Lachrymal gland, Seminal vesicles, Prostate gland. (d) Vasopressin, Growth hormone, TSH, ACTH, FSH. (e) Semicircular canals, Cochlea, tympanum, utriculus. [5] (iv) Copy and complete the following by filling in the blanks 1 to 5 with appropriate words/terms phrases : To test the leaf for starch, the leaf is boiled in water to . (1). It is next boiled in methylated spirit to . (2). The leaf is placed in warm water to soften it. It is then placed in a dish and . (3) solution is added. The region, which contains starch, turns . (4) and the region, which does not contain starch, turns . [5] 3 2022 Turn over (v) Given below is an example of certain structures and their special functional activities: For example : Eye and vision. On, a similar pattern complete the following : (a) Neutrophils: (b) Ureter: (c) Neurotransmitters: (d) Iris of the eye : (e) Placenta: [5] SECTION B (Attempt any four questions from this Section.) Question 3. The figure given below represents an experiment to demonstrate a particular aspect of photosynthesis. The alphabet A represents a certain condition inside the flask. (i) What is the aim of the experiment ? [1] (ii) (a) Identify the special condition inside the flask. (b) Name an alternative chemical that can be used instead of KOH. [2] (iii) In what manner do the leaves 1 and 2 differ at the end of the starch test ? [2] (iv) Give the balanced equation of the physiological process studied here. [2] (v) Mention three adaptive features that help the plant for photosynthesis. [3] Question 4. Given below is a diagram of the lateral section of an organ of a man. Study the same and answer the questions that follow : 4 2022 (i) Name the organ shown above? [1] (ii) Label the parts numbered 1 to 4 of the diagram. [2] (iii) What is the role played by-the inguinal canal ? Why does it descend in the scrotal sac before birth? [2] (iv) What is semen ? [2] (v) State the functions of the parts labelled 1 and 3. [3] Question 5. Given below is a schematic diagram showing Mendel s Experiment on sweet pea plants having axial flowers with round seeds (AARR) and Terminal flowers with wrinkled seeds (aarr). Study the same and answer the questions that follow : (i) Give the phenotype of F1 progeny. [1] (ii) State the law induced by Mendel on the basis of the above observation. [2] (iii) Give the phenotypes of F2 progeny produced upon by the self-pollination of progeny.(Show the cross) [2] (iv) Give the phenotypic ratio of F2 progeny. [2] (v) Define the following terms: Phenotype, Genotype, Heterozygous cross [3] Question 6. The diagram given below represents a certain stage of mitosis : 5 2022 Turn over (i) Identify the stage of cell division. [1] (ii) Name the parts labelled A and B. [2] (iii) Name the next stage. What is the unique feature observed in that stage ? [2] (iv) How many daughter cells formed from this type of cell division ? How many chromosomes are visible here? [2] (v) Define: Gene, Nucleosomes, Nucleotides [3] Question7. The diagram given below shows a section of a human kidney. Study the diagram carefully and answer the questions that follow : (i) Why does part 2 have a striped appearance ? [1] (ii) Label the parts numbered 1 to 4. [2] (iii) What is the fluid that passes down part 4 ? Name the main nitrogenous waste present in it. [2] (iv) Draw neat and labelled diagram of Malpighian Capsule. [2] (v) What is acid rain? Give two harmful effects of water pollution. [3] Question 8. (i) Which hormone plays an important role in parturition? (ii) Discuss the orientation of the white matter and grey matter of the neuron in the brain and spinal cord. 6 2022 [1] [2] (iii) Mention the functions of cerebellum. [2] (iv) Define: Vasectomy, Tubectomy [2] (v) Differentiate between the following on the basis of what is given in brackets: [3] (a) Myopia and Hypermetropia (Condition of eyeball) (b) Rods and Cones (Pigment Present) (c) Tonoplast and Plasma membrane (Location) 7 2022 Turn over

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