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