Causes of Biodiversity loss MCQs with Explanations
Biodiversity loss results from habitat destruction, overexploitation, invasive species, pollution and climate change. Understanding these causes is essential for environmental conservation and competitive exam preparation.
Correct Answer:
(D)
All the above
The main cause of the loss of biodiversity is the influence of human beings on the world’s ecosystem. The threats to biodiversity can be summarized in the following main points:
Alteration and loss of the habitats
Introduction of exotic species and genetically modified organisms
Pollution
Climate change
Overexploitation of resources
Ques: 2
The main reason for the decrease in biodiversity is:
Correct Answer:
(D)
Natural habitat destruction
Natural habitat destruction is the main reason for the decrease in biodiversity as the transformation of the natural areas determines not only the loss of the plant species but also a decrease in the animal species associated with them.
Ques: 3
Which of the following can be threats to the biodiversity of a geographical area?
Global warming
Fragmentation of habitat
Invasion of alien species
Promotion of vegetarianism
Select the correct answer using the code given below:
Correct Answer:
(A) 1, 2 and 3
Global warming, fragmentation of habitat and invasion of alien species can be threats to the biodiversity of a geographical area while promotion of vegetarianism is not responsible for the same. Hence option (a) is the correct answer.
Ques: 4
Which one of the following strongly threatens biodiversity?
Correct Answer:
(C) Destruction of natural habitats and vegetation, and Jhum cultivation
Some of the main threats to biodiversity are: 1. Human Activities and Loss of Habitat, 2. Deforestation, 3. Desertification, 4. Marine Environment, 5. Increasing Wildlife Trade and 6. Climate Change. The current practice of shifting cultivation or Jhum cultivation in eastern and northeastern regions of India is an extravagant and unscientific form of land use. The effects of shifting cultivation are devastating and far-reaching in degrading the environment and ecology of these regions.
Q .5 Which of the following is not a reason for the loss of bio-diversity in Uttarakhand?
Expansion of Roads
Urbanization
Afforestation of barren land
Extension of Agriculture
Ans. (c)
Exp: Afforestation of barren land is not a reason for the loss of biodiversity while the expansion of roads, urbanization and extension of agriculture are responsible for the loss of biodiversity.
Ques: 5
The most important factor contributing to the loss of the vulture population in India is:
Correct Answer:
(C) Administrating of painkillers to cattle
Administrating of painkillers to cattle is the main cause of loss of vulture population in India. Diclofenac is the drug that acted as a major cause of death of vultures. Diclofenac is an anti-inflammatory, painkiller drug that was used widely in India in the 90s. It proved fatal to vultures.