Environment & Ecology GK Questions and Answers | Environment & Ecology MCQs

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1. Which of the following fuel creates lowest environmental pollution?
  1. Diesel
  2. Kerosene
  3. Hydrogen
  4. More than one of the above

Answer:Hydrogen

2. According to Shelford’s Law of Tolerance, the organisms wide environmental factor tolerance limit show
  1. Narrow distribution with low population size
  2. Wide distribution with high population size
  3. Narrow distribution with high population size
  4. Wide distribution with low population size

Answer: Wide distribution with high population size.

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3. Allelopathy refers to
  1. Inhibition of growth of one species by another by the production of toxins
  2. Inhibition of sporulation of pathogen by the host
  3. Altering the reproductive cycle of one organism by another
  4. Inhibition of growth of one species by another by preventing reproduction

Answer: Inhibition of growth of one species by another by the production of toxins.

4. Select a non-denitrifying bacteria
  1. Pseudomonas aeruginosa
  2. Thiobacillus
  3. Thiobacillus denitrificans
  4. Bacillus ramosus

Answer: Bacillus ramosus.

5. dB is the abbreviation used for the quantitative expression of
  1. The density of bacteria in a medium
  2. A Particular Pollutant
  3. Dominant Bacillus in a culture
  4. A pesticide

Answer: A Particular Pollutant.

6. Which of the following countries is famous for its Marsupial Animals?
  1. Australia
  2. Brazil
  3. South Africa
  4. Russia

Answer: Australia

7. In the following, which is a warm-blooded animal?
  1. Pigeon
  2. Crocodile
  3. Toad
  4. Fish

Answer: Pigeon

8. Which of the following is considered an atmospheric Secondary pollutant?
  1. Ozone
  2. Sulfur Dioxide
  3. Nitrogen Oxides
  4. Carbon Monoxide

Answer: Ozone

9. The natural residence of every organism is known as:
  1. Biome
  2. Niche
  3. Habit
  4. Habitat

Answer: Habitat

10. Shelford’s law of tolerance suggests that organisms with a wide tolerance limit for environmental factors show:
  1. Narrow distribution with low population
  2. Wide distribution with high population
  3. Wide distribution with high population
  4. Narrow distribution with high population

Answer: Wide distribution with high population

11. A mutual relationship between two organisms, where both of them are benefitting from watching the other is called:
  1. Mutualism
  2. Symbiosis
  3. Parasitism
  4. Food chain

Answer: Mutualism

12. Which of the following is not a feature of ‘r’ selected species?
  1. Reproduce quickly
  2. The low survival rate of progenies
  3. Reproduce a large number of progenies
  4. Paternal care

Answer: Paternal care

13. Select the incorrect statement
  1. Economic development is linked to environmental conservation
  2. Sustainable development encourages development for current generation and conservation of resources for future generations
  3. Sustainable development does not consider the view points of stakeholders
  4. More than one of the above

Answer: Sustainable development does not consider the view points of stakeholders

14. Which is the renewable exhaustible natural energy resource?
  1. Coal
  2. Petroleum
  3. Kerosene
  4. Biomass

Answer: Biomass

15. The process of vernalization is practised in
  1. Cold countries
  2. Hot countries
  3. Only in sub-tropical countries
  4. Only in tropical countries

Answer: Cold countries.

16. In an ecosystem, the energy flow is always
  1. Always unidirectional
  2. Always bidirectional
  3. In any direction
  4. Always down directiona

Answer: Always unidirectional

17. Ranthambore National Park is located in which state?
  1. Madhya Pradesh
  2. Rajasthan
  3. Uttar Pradesh
  4. Maharashtra

Answer: Rajasthan

18. After Methane, which of the following makes up the majority of biogas?
  1. Carbon Dioxide
  2. Oxygen
  3. Hydrogen
  4. Ammonia

Answer: Carbon Dioxide

19. Shelford’s law of tolerance indicates that organisms with a wide tolerance limit for environmental factors show:
  1. Wide distribution with low population
  2. Narrow distribution with low population
  3. Narrow distribution with high population
  4. Wide distribution with high population

Answer: Wide distribution with high population

20. What is the name of the feature that allows organisms to survive in the conditions of their habitat?
  1. Adjustment
  2. Adaptation
  3. Acclimatization
  4. Adaptive variation

Answer: Adaptation

21. A wide variety of living organisms is called:
  1. Biodiversity
  2. Population
  3. Habitat
  4. Diversity

Answer: Biodiversity

22. Hyenas and Vultures are ________________.
  1. Omnivorous
  2. Scavengers
  3. Carnivorous
  4. Herbivorous

Answer: Scavengers

23. Plants growing under direct sunlight are known as
  1. Heliophytes
  2. Sciophytes
  3. Psamophytes
  4. Dicots

Answer: Heliophytes

24. Which is not the characteristic of ‘r’ selected species?
  1. Reproduce quickly
  2. Parental care
  3. A low survival rate of progenies
  4. Produce a large number of progenies

Answer: Parental care

25. The ability of a population to increase under ideal environmental conditions is called
  1. Natality
  2. Carrying capacity
  3. Biotic potential
  4. Absolute natality

Answer: Biotic potential.

26. What type of food chain is it?

dead animals → blowfly maggot → maggots → frog → snake

  1. Detrital food chain
  2. Decomposer food chain
  3. Predator food chain
  4. Grazing food chain

Answer: Detrital food chain

27. The eggshell of birds becomes thin by the pollution from pesticides due to the interference in the activity of
  1. Calmodulin
  2. MgATPase
  3. CaATPase
  4. Calcium

Answer: CaATPase

28. Which year did the Forest Conservation Act Pass?
  1. 1986
  2. 1990
  3. 1980
  4. 1988

Answer: 1980

29. Shelford’s law of tolerance is named after:
  1. James Shelford.
  2. Jacob Shelford
  3. Ernest Shelford
  4. None of these

Answer: Ernest Shelford

30. In which one of the following, methanogens, i.e methane producing bacteria are NOT present?
  1. Rumen of cattle
  2. Aerobic environment
  3. Anaerobic sludge
  4. More than one of the above

Answer: Aerobic environment

31. Which of the following requires maximum energy?
  1. Secondary consumer
  2. Decomposer
  3. Primary consumer
  4. Primary producer

Answer: Primary producer.

32. The population of birds declined in an area where DDT was extensively used. Why?
  1. The birds stopped laying eggs
  2. The eggs laid by the birds did not hatch
  3. The snakes ate the eggs
  4. The DDT spray killed all the birds

Answer:The eggs laid by the birds did not hatch.

33. The primary causes of wintertime smog are:
  1. N2O and hydrocarbons
  2. NOx and hydrocarbons
  3. SO2 and hydrocarbons
  4. SO2 and ozone

Answer:NOx and hydrocarbons

33. Which one is a ‘K’ selected species?
  1. Aspergillus
  2. Human
  3. Taraxacum
  4. Grass

Answer:Human

34. What is the natural residence of every organism known?
  1. Biome
  2. Habit
  3. Niche
  4. Habitat

Answer:Habitat

35. Plants growing under shade are known as
  1. Psamophytes
  2. Sciophytes
  3. Heliophytes
  4. Monocots

Answer:Sciophytes

36. The ratio between energy flow at different points in a food chain is known as
  1. Ecological capacity
  2. Ecological efficiency
  3. Ecological assimilation
  4. Ecological potential

Answer:Ecological efficiency.

37. Which state is the Nokrek Biosphere Reserve situated in?
  1. Nagaland
  2. Meghalaya
  3. Arunachal Pradesh
  4. Sikkim

Answer:Meghalaya

38. Animal adopts a similar state like sleep to reduce their metabolic rate, it is called:
  1. Migration
  2. Transpiration
  3. Hibernating
  4. None of these

Answer:Hibernating

39. An orchid living on a tree exhibits
  1. Predator
  2. Mutualism
  3. Commensalism
  4. Parasitism

Answer:Commensalism

40. Lincoln index measures
  1. Population mortality rate
  2. Population natality rate
  3. Population size
  4. Population density

Answer:Population size.

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