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Class 10 Notes 2018 : Biology (Ambassador School, Dubai)

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Khushi Panigrahi
Ambassador School, Dubai

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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 is the time allowed for writing the answers. Part - I is compulsory. Attempt any four questions from Part II. The intended marks for questions or parts of questions are given in brackets [ ]. Part-1 (All questions are compulsory.) Question 1 A. Name the following: [5] 1. The official data of registered number of people in a selected area 2. A bundle of axons enclosed in a sheath 3. The pairing of homologous chromosomes 4. The other name for inner ear 5. The physical expression of genes in an individual B. Write the expanded form of the following: [5] 1. PGA 2. ICSH 3. ACTH 4. CNS 5. GnRH C. Given below are a few sets of terms. In each case arrange and rewrite each set of terms so as to be in logical sequence. [5] 1. sperm duct, seminiferous tubule, urethra, ejaculatory duct, epididymis 2. pupil, eye lens, cornea, optic nerve, vitreous humour, fovea 3. tympanum, auditory canal, cochlea, ear ossicles, auditory nerve 4. reduction of CO2, radiant energy, formation of glucose, splitting of water into H + and OH ions, production of oxygen 5. cortical cells, midribs, soil water, endodermis, root hair, xylem. D. Choose the correct option and write the alphabet and the answer in the answer sheet [5] 1. Which structures must be present in a cell for osmosis to take place? A. cell (sap) vacuole and cell wall B. cell wall and cell membrane C. chloroplast and cytoplasm D. cytoplasm and cell membrane 2. In the ureter of a healthy person, which substance is not found? A. glucose C. toxins B. salt D. urea 3. A short-toed animal was crossed with a long-toed animal of the same species. All the offspring had short toes. One of these offspring was crossed with another long-toed animal of the same species. Which ratio of short-toed to long-toed animals should be expected? A. 1 : 1 B. 2 : 1 C. 3 : 1 D. 4 : 1 4. In a mesophyll cell, where are chloroplasts found? A. between the cell wall and the cell membrane B. in the cytoplasm C. in the nucleus D. in the vacuole 5. A man injures his arm in an accident. Afterwards, he can feel objects touching his hand, but he cannot move his hand away from them. What could cause this? A. Receptors in his hand are damaged. B. The nerve connection is cut only between the receptors in his hand and his central nervous system. C. The nerve connection is cut only between his central nervous system and the effectors in his arm. D. Both of these nerve connections are cut. ICSE 10 prelim 1 2015-16 1

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