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