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