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: Hybrid Mutation Heterozygous Homozygous None Hint 2. Passing of characters from parents to offspring is: Heredity Selection Mutation Evolution None Hint 3. DNA stands for: Deoxyribonucleic Acid None Double Nitric Acid Dinucleic Acid None Hint 4. Boiling point of water is: 120°C 100°C 75°C 50°C None Hint 5. Excess nutrients in water causes: Condensation Evaporation Eutrophication Pollution None Hint 6. Freezing point of water is: 10°C –5°C 0°C 5°C None Hint 7. Law of segregation was given by: Darwin Newton Lamarck Mendel None Hint 8. Safe drinking water should be: Dirty Salty Clear and germ free Coloured None Hint 9. Ozone layer protects us from: Rain Dust UV rays Heat None Hint 10. Study of heredity and variation is called: Physics Biology Chemistry Genetics None Hint 11. Freezing point of water is: 5°C 10°C –5°C 0°C None Hint 12. Process of vapour turning into water is: Condensation Sublimation Melting Evaporation None Hint 13. The hidden trait is called: Allele Recessive Dominant Gene None Hint 14. Gas required for respiration is: Nitrogen Carbon dioxide Oxygen Helium None Hint 15. Sudden heritable change is: Mutation Selection Adaptation Variation None Hint 16. A change in gene is called: Variation Selection Mutation Evolution None Hint 17. Water cycle includes: Evaporation Precipitation Condensation All of these None Hint 18. Number of chromosomes in human body cell is: 46 48 44 23 None Hint 19. Main source of water pollution: Sewage and industrial waste Sunlight Trees Wind None Hint 20. XX chromosome represents: Male None Female Both None Hint 21. Water covers about ____ of Earth surface: 30% 50% 10% 71% None Hint 22. Acid rain is caused by: Nitrogen and sulphur oxides Carbon Hydrogen Oxygen None Hint 23. Air contains water vapour which causes: Heat Wind Light Rain None Hint 24. The trait which appears in F1 generation is: Hidden Recessive Dominant Mutant None Hint 25. Heredity is the transmission of: Energy Traits from parents to offspring Food Diseases None Hint 26. Number of chromosomes in human gamete is: 44 46 23 22 None Hint 27. Conservation of water means: Heating water Wasting water Polluting water Saving water None Hint 28. Chromosomes are made of: Fat RNA only DNA and protein Protein only None Hint 29. Gas responsible for global warming is: Oxygen Carbon dioxide Helium Nitrogen None Hint 30. Hard water contains: Nitrogen Carbon dioxide Oxygen Calcium and magnesium salts None Hint 31. The major component of air is: Oxygen Nitrogen Hydrogen Carbon dioxide None Hint 32. Plants use carbon dioxide for: Excretion Respiration Photosynthesis Digestion None Hint 33. Physical expression of gene is: Mutation Allele Genotype Phenotype None Hint 34. Soft water is good for: Washing and cleaning Cooking only Irrigation only Drinking only None Hint 35. Percentage of oxygen in air is about: 50% 78% 1% 21% None Hint 36. Genetic makeup of organism is: Trait Mutation Genotype Phenotype None Hint 37. Mendel’s law explains: Energy Light Inheritance of traits Motion None Hint 38. XY chromosome represents: Female None Both Male None Hint 39. Father of Genetics is: Watson Mendel Lamarck Darwin None Hint 40. Main cause of air pollution is: Trees Rivers Vehicles and industries Soil None Hint 41. Alternative forms of a gene are called: Genes Traits Alleles Cells None Hint 42. Method to purify water at home: Heating slightly Freezing Mixing soil Boiling None Hint 43. Genes are located on: Chromosomes Cytoplasm Mitochondria Ribosomes None Hint 44. Fresh water is mainly found in: Seas Atmosphere Oceans Rivers and lakes None Hint 45. When alleles are different it is called: Clone Pure Heterozygous Homozygous None Hint 46. Air is a mixture of: Solids Liquids Gases Metals None Hint 47. The basic unit of heredity is: Organ Cell Tissue Gene None Hint 48. Mendel experimented on: Pea plant Wheat Rice Maize None Hint 49. The genetic material is: Fat DNA Protein Sugar None Hint 50. Process of water turning into vapour is: Evaporation Freezing Melting Condensation 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
