SSLC Science and Technology NIOS VIII Welcome to your SSLC Science and Technology NIOS VIII Total Questions: 50 Name Mobile No: 1. Genetic makeup of organism is: Mutation Trait Phenotype Genotype None Hint 2. A change in gene is called: Mutation Evolution Variation Selection None Hint 3. XY chromosome represents: Both Male Female None None Hint 4. Water cycle includes: Evaporation All of these Precipitation Condensation None Hint 5. Heredity is the transmission of: Diseases Food Traits from parents to offspring Energy None Hint 6. Number of chromosomes in human body cell is: 46 48 23 44 None Hint 7. Plants use carbon dioxide for: Excretion Photosynthesis Respiration Digestion None Hint 8. Mendel experimented on: Rice Maize Wheat Pea plant None Hint 9. Air is a mixture of: Metals Gases Solids Liquids None Hint 10. The major component of air is: Hydrogen Oxygen Carbon dioxide Nitrogen None Hint 11. When alleles are different it is called: Homozygous Heterozygous Pure Clone None Hint 12. Sudden heritable change is: Selection Mutation Variation Adaptation None Hint 13. Air contains water vapour which causes: Light Rain Heat Wind None Hint 14. Chromosomes are made of: Protein only DNA and protein RNA only Fat None Hint 15. Father of Genetics is: Watson Mendel Lamarck Darwin None Hint 16. Conservation of water means: Polluting water Saving water Wasting water Heating water None Hint 17. Main cause of air pollution is: Trees Soil Rivers Vehicles and industries None Hint 18. Percentage of oxygen in air is about: 78% 21% 50% 1% None Hint 19. Alternative forms of a gene are called: Traits Cells Alleles Genes None Hint 20. Passing of characters from parents to offspring is: Mutation Selection Evolution Heredity None Hint 21. XX chromosome represents: None Female Male Both None Hint 22. Hard water contains: Nitrogen Oxygen Calcium and magnesium salts Carbon dioxide None Hint 23. Number of chromosomes in human gamete is: 23 44 22 46 None Hint 24. Study of heredity and variation is called: Biology Chemistry Genetics Physics None Hint 25. Mendel’s law explains: Energy Inheritance of traits Light Motion None Hint 26. Soft water is good for: Washing and cleaning Irrigation only Drinking only Cooking only None Hint 27. Safe drinking water should be: Salty Dirty Coloured Clear and germ free None Hint 28. Method to purify water at home: Freezing Heating slightly Boiling Mixing soil None Hint 29. Fresh water is mainly found in: Seas Oceans Rivers and lakes Atmosphere None Hint 30. When both alleles are same it is called: Mutation Heterozygous Hybrid Homozygous None Hint 31. Gas responsible for global warming is: Oxygen Helium Nitrogen Carbon dioxide None Hint 32. The hidden trait is called: Dominant Allele Gene Recessive None Hint 33. Freezing point of water is: 5°C –5°C 10°C 0°C None Hint 34. Law of segregation was given by: Newton Mendel Lamarck Darwin None Hint 35. Process of water turning into vapour is: Condensation Evaporation Freezing Melting None Hint 36. Boiling point of water is: 100°C 50°C 120°C 75°C None Hint 37. Main source of water pollution: Wind Trees Sunlight Sewage and industrial waste None Hint 38. Physical expression of gene is: Allele Mutation Phenotype Genotype None Hint 39. DNA stands for: Dinucleic Acid None Double Nitric Acid Deoxyribonucleic Acid None Hint 40. Excess nutrients in water causes: Eutrophication Evaporation Condensation Pollution None Hint 41. Process of vapour turning into water is: Sublimation Evaporation Melting Condensation None Hint 42. Gas required for respiration is: Carbon dioxide Oxygen Helium Nitrogen None Hint 43. Freezing point of water is: –5°C 0°C 5°C 10°C None Hint 44. The trait which appears in F1 generation is: Recessive Mutant Dominant Hidden None Hint 45. Ozone layer protects us from: Dust UV rays Heat Rain None Hint 46. The genetic material is: Protein Fat Sugar DNA None Hint 47. Acid rain is caused by: Hydrogen Carbon Oxygen Nitrogen and sulphur oxides None Hint 48. Water covers about ____ of Earth surface: 71% 30% 50% 10% None Hint 49. The basic unit of heredity is: Cell Organ Gene Tissue None Hint 50. Genes are located on: Cytoplasm Chromosomes Ribosomes Mitochondria None Hint Time's up Share: admin Previous post SSLC Science and Technology NIOS VII February 12, 2026 Next post SSLC Science and Technology NIOS IX February 12, 2026
