Class 12 Biology MCQ

Test your knowledge with important Class 12 Biology MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Class 12 Biology MCQs at Bissoy

• Which award is given to the individuals or communities from rural areas that have shown a significant contribution and dedication in the protection of wildlife in the Country?
  ক

  Arjuna Award

  খ

  Padma Bhushan Award

  গ

  Rajiv Gandhi Wildlife Conservation Award

  ঘ

  Amrita Devi Bishnoi Wildlife Protection Award
• For what reason was the Chipko Movement launched?
  ক

  Protection of humans

  খ

  Protection of forest

  গ

  Protection of ponds and lakes

  ঘ

  Protection of animals
• What is the process of re-growing a forest that once existed but was cut-down in the past called?
  ক

  Deforestation

  খ

  Jhum cultivation

  গ

  Reforestation

  ঘ

  Greenhouse effect
• Which one of the following is known as the slash and burn agriculture?
  ক

  Afforestation

  খ

  Crop cultivation

  গ

  Room cultivation

  ঘ

  Jhum cultivation
• In which of the following process the farmers cut down the trees of the forest and burn the plant remains?
  ক

  Room cultivation

  খ

  Jhum cultivation

  গ

  Crop cultivation

  ঘ

  Afforestation
• By the end of the twentieth century what percent of the land of India was covered by forests?
  ক

  19.4 %

  খ

  30.3 %

  গ

  50.5 %

  ঘ

  56.8 %
• What is the process of removal of forest cover of an area called?
  ক

  Afforestation

  খ

  Deforestation

  গ

  Pollution

  ঘ

  Greenhouse effect
• Which protocol was signed to control the emission of ozone-depleting substances?
  ক

  France Protocol

  খ

  Germany Protocol

  গ

  India Protocol

  ঘ

  Montreal Protocol
• Which of the following is an effect of the high dose of UV-B?
  ক

  Night-blindness

  খ

  Snow-blindness

  গ

  Fatigue

  ঘ

  Nausea
• What does the continuous depletion of ozone lead to?
  ক

  Proper rains

  খ

  Ozone formation

  গ

  Ozone hole

  ঘ

  Good yield
• In which region is the depletion of ozone particularly marked?
  ক

  Equatorial region

  খ

  Temperate region

  গ

  Tropical region

  ঘ

  Antarctic region
• Who enhances the degradation of ozone?
  ক

  Hydrogen

  খ

  Chlorofluorocarbons

  গ

  Oxygen

  ঘ

  Water vapors
• How is the thickness of the ozone in a column of air from the ground to the top of the atmosphere measured?
  ক

  Dobson units

  খ

  Hertz

  গ

  Centimeter

  ঘ

  Ampere
• In which part of the atmosphere is the good ozone found?
  ক

  Ionosphere

  খ

  Stratosphere

  গ

  Lithosphere

  ঘ

  Hydrosphere
• Which one of the following ways can be used to control global warming?
  ক

  Increasing deforestation

  খ

  Reducing efficiency of energy usage

  গ

  Reducing the use of fossil fuel

  ঘ

  Increasing the growth of human population
• What does the increase in the level of greenhouse gases lead to?
  ক

  No change in ecosystem cycles

  খ

  Proper plant growth

  গ

  Proper rainfall

  ঘ

  Global warming
• Which gases are commonly known as greenhouse gases?
  ক

  Nitrogen

  খ

  Carbon dioxide

  গ

  Chlorine

  ঘ

  Oxygen
• Which naturally occurring phenomenon is responsible for heating of Earth’s surface and atmosphere?
  ক

  Eutrophication

  খ

  Bio-magnification

  গ

  Greenhouse effect

  ঘ

  Cooking
• What helps in warming the greenhouse?
  ক

  Light

  খ

  Energy

  গ

  Plants

  ঘ

  Heat
• In a greenhouse the glass panel lets the light in, but what is not escaped?
  ক

  Light

  খ

  Heat

  গ

  Energy

  ঘ

  Air
• What is a small glasshouse used for growing plants especially during winter called?
  ক

  Greenhouse

  খ

  Lakehouse

  গ

  Boathouse

  ঘ

  Treehouse
• From which phenomenon is the term ‘Greenhouse effect’ derived?
  ক

  That occurs in a boathouse

  খ

  That occurs in a greenhouse

  গ

  That occurs in a blue house

  ঘ

  That occurs in a house
• Which of the following element is most hazardous to humans?
  ক

  Phosphorous

  খ

  Sulfur

  গ

  Carbon

  ঘ

  Uranium
• To dispose of which waste are the deep pits dug in desert areas or in the sea bottom?
  ক

  Agricultural waste

  খ

  Industrial waste

  গ

  Radioactive waste

  ঘ

  Sewage waste
• Which of the following is an extremely potent pollutant?
  ক

  Wastewater

  খ

  Pesticide

  গ

  Electronic waste

  ঘ

  Nuclear waste
• At what dose does nuclear radiation create various disorders?
  ক

  Extreme high dose

  খ

  Low dose

  গ

  High dose

  ঘ

  No dose
• At which dose is nuclear radiation considered lethal?
  ক

  Low dose

  খ

  Moderate dose

  গ

  High dose

  ঘ

  No dose
• Which of the following causes mutations at a very high rate?
  ক

  Automobiles

  খ

  Compost

  গ

  Fertilizers

  ঘ

  Radiation
• Which of the following problem occurs due to the use of nuclear energy?
  ক

  Accidental leakage

  খ

  Formation of compost

  গ

  Formation of gobar gas

  ঘ

  Generation of electricity
• Initially which energy was approved as a non-polluting way for generating electricity?
  ক

  Water energy

  খ

  Nuclear energy

  গ

  Solar energy

  ঘ

  Soil energy