Biodiversity MCQs with answers

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Biodiversity refers to the variety of life forms on Earth, encompassing different species of plants, animals, microorganisms, and the ecosystems they inhabit. It represents the totality of genes, species, and ecosystems in a given area.

Biodiversity MCQs with answers practice now

Levels of Biodiversity:

  1. Genetic Diversity: The variation of genes within a species. It allows organisms to adapt to changing environments and plays a crucial role in evolution.
  2. Species Diversity: The variety of different species present in a specific area. It measures the number of different organisms within a particular ecosystem.
  3. Ecosystem Diversity: The variety of ecosystems present on Earth. It includes diverse habitats, communities, and ecological processes within a landscape.

Importance of Biodiversity:

  1. Ecosystem Stability: Biodiversity ensures the resilience of ecosystems, making them less vulnerable to environmental changes.
  2. Economic Benefits: Many industries rely on biodiversity for resources like food, medicine, and raw materials.
  3. Cultural Significance: Biodiversity is integral to cultural practices, traditions, and spiritual beliefs of many indigenous communities.
  4. Ecological Services: It provides crucial services like pollination, air and water purification, soil fertility, and climate regulation.

Threats to Biodiversity:

  1. Habitat Destruction: Deforestation, urbanization, and land conversion for agriculture are major threats.
  2. Climate Change: Altering habitats, affecting migration patterns, and causing shifts in ecosystems.
  3. Pollution: Contaminants in air, water, and soil harm various species and disrupt ecosystems.
  4. Invasive Species: Non-native species can outcompete native species, disrupting the balance of ecosystems.

Conservation Efforts:

  1. Protected Areas: Establishment of national parks, reserves, and wildlife sanctuaries to safeguard habitats.
  2. Legislation and Policies: Implementing laws to regulate activities that harm biodiversity.
  3. Public Awareness: Education and outreach programs to raise awareness about biodiversity and its importance.
  4. Sustainable Practices: Promoting sustainable agriculture, fishing, and forestry to minimize impact on ecosystems.

Questions & Answers:

Why is biodiversity important for human life?

A: Biodiversity provides essential resources for human survival, such as food, medicine, and clean air and water. It also contributes to economic stability and cultural diversity.

How does biodiversity loss affect ecosystems?

A: Loss of biodiversity can disrupt ecosystem functioning, leading to reduced resilience against environmental changes, affecting nutrient cycling, pollination, and overall ecosystem stability.

What can individuals do to help conserve biodiversity?

A: Individuals can contribute by practicing sustainable habits, supporting conservation initiatives, reducing waste, and advocating for policies that protect ecosystems.

What role does biodiversity play in climate change mitigation?

A: Diverse ecosystems act as carbon sinks, absorbing and storing carbon dioxide, thus helping mitigate climate change impacts.

Biodiversity MCQs with answers

Q1. Biodiversity means –   

 (a) Diverse kinds of plants and vegetation.

 (b) Diverse kinds of animals.

 (c) Diverse kinds of plants and animals in a particular area.

 (d) Diverse kinds of exotic plants and animals.

(c) Diverse kinds of plants and animals in a particular area.

Q2. The most signifi cant aspect of biodiversity is:

(a) Food  

(b) Drug

(c) Industrial Use

(d) Maintenance of ecosystem

(d) Maintenance of ecosystem

Q3. The destruction of biodiversity is due to:

(a) The lack of natural habitats of the organism

(b) Environmental pollution

(c) Destruction of forests 

(d) All the above

(d) All the above

Q4. The main reason for the decrease in biodiversity is:

(a) Habitat pollution 

(b) Introduction of exotic species 

(c) Over exploitation 

(d) Natural habitat destruction

(d) Natural habitat destruction

Q5. Which of the following is NOT an example of in-situ  conservation strategy?

(a) Biosphere reserve 

(b) Botanical garden 

(c) National Park 

(d) Sacred groves

(b) Botanical garden

Q6. The World Biodiversity Day is observed 

(a) March, 22

(b) May, 22 

(c) June, 23

(d) April, 16

(b) May, 22

Q7. Which of the following is considered a ‘hot-spot’ of  biodiversity in India?

(a) Aravalli hills 

(b) Indo-Gangetic plain

(c) Eastern Ghats 

(d) Western Ghats

(d) Western Ghats

Q8. India aims to achieve land degradation neutrality by  the year:

(a) 2025 

(b) 2030

(c) 2035

(d) 2040

(b) 2030

Q9. “Red Data Book” is published by –

(a) USEPA 

(b) IUCN 

(c) WWF 

(d) IG-BP

((b) IUCN

Q10. ‘Red Data Book’ contains data of 

(a) Exotic species 

(b) Endangered species 

(c) Economically important species 

(d) All plant and animal species

(b) Endangered species

Q11.Which one of the following is an important strategy  for the conservation of biodiversity?

(a) Biosphere Reserves 

(b) Botanical Gardens 

(c) National Parks 

(d) Wild Life Sanctuaries

(a) Biosphere Reserves

Q12. The maximum biodiversity is found in

(a) Tropical rainforest  

(b) Temperate forest

(c) Coniferous forest   

(d) Arctic forest

(a) Tropical rainforest

Q13. In which of the following types of forests maximum  plant diversity is found?

(a) Tropical moist deciduous forests

(b) Sub-tropical mountain forests

(c) Temperate moist forests

(d) Tropical evergreen forests

(d) Tropical evergreen forests

Q14. ‘Silent Valley’ is located in 

(a) Uttarakhand 

(b) Kerala 

(c) Arunachal Pradesh 

(d) Jammu & Kashmir

(b) Kerala

Q15. ‘Valley of Flowers’ is situated in 

(a) Kerala

(b) Jammu & Kashmir

(c) Uttarakhand 

(d) Himachal Pradesh

(c) Uttarakhand

Q16. The Ramsar Convention was associated with the  conservation of 

(a) Bio-fuels 

(b) Forests

(c) Wetlands

(d) Drylands

(c) Wetlands

Q17. Wetland day is observed on 

(a) 2nd February 

(b) 2nd April 

(c) 2nd May

(d) 2nd March

(a) 2nd February

Q18. Cartagena protocol is related to:

(a) Bio-safety agreement

(b) Pollution

(c) Ozone depletion

(d) Climate Change

(a) Bio-safety agreement

Q19. Which one of the following is the most effective factor  of coral bleaching?

(a) Marine pollution

(b) Increase of salinity of seas

(c) Rise in normal temperature of sea-water  (d) the outbreak of diseases and epidemics

(c) Rise in normal temperature of sea-water

Q20. Which of the following have coral reefs?

1. Andaman and Nicobar Islands

2. Gulf of Kachchh  

3. Gulf of Mannar  

4. Sunderbans  

Select the correct answer using the code given below:

(a) 1, 2 and 3 only

(b) 2 and 4 only

(c) 1 and 3 only 

(d) 1, 2, 3 and 4

(c) 1 and 3 only

Q21. The decade 2011-20 has been designated by the U.N.O.  as the decade of (a) Natural disaster decade 

(b) Biodiversity decade

(c) Climate-change decade

(d) Environment decade

(b) Biodiversity decade

Q22.In which year ‘Biodiversity Act’ was passed in India?

(a) 2000

(b) 2002 

(c) 2010

(d) 2017

(b) 2002

Q23. Biodiversity changes occur:

(a) Increases towards the equator  (b) Decreases towards the equator  (c) Remains unchanged throughout the Earth

(d) Increases towards the poles

(a) Increases towards the equator

Q24. The rapid rate of decline in the vulture population in  India is mainly due to:

(a) Overuse of Diclofenac drug 

(b) Low death rate of animals 

(c) High death rate of animals

(d) Cleanliness

(a) Overuse of Diclofenac drug

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Q25.As an ecosystem, wetlands are useful for which of the  following?

(a) For nutrient-recovery and cycling

(b) For releasing heavy metals through absorption by  plants.

(c) In reducing siltation of rivers by retaining sediments 

(d) All the above

(d) All the above

Q26. The author of ‘Tomorrow’s  Biodiversity’ is 

(a) Vandana Shiva 

(b) V.K. Sharma 

(c) M.S. Swaminathan

(d) Medha Patekar

(a) Vandana Shiva

Q27. What does the term “endemic species” refer to?

a) Species that are at risk of extinction

b) Species that migrate seasonally

c) Species that are native to a specific area and found nowhere else

d) Species that have a wide global distribution

c) Species that are native to a specific area and found nowhere else

Q28. Which of the following is NOT a level of biodiversity?

a) Genetic diversity

b) Species diversity

c) Ecosystem diversity

d) Population diversity

d) Population diversity

Q29. Which biome is characterized by low temperatures, permafrost, and limited vegetation?

a) Grassland

b) Tundra

c) Rainforest

d) Desert

b) Tundra

Q30. What does the term “keystone species” refer to in an ecosystem?

a) Species that are extremely rare and endangered

b) Species that are at the top of the food chain

c) Species that have a disproportionately large impact on their environment

d) Species that are found only in forests

c) Species that have a disproportionately large impact on their environment

Q31. Which factor contributes most significantly to the current rapid decline in biodiversity?

a) Natural disasters

b) Climate change

c) Hunting and poaching

d) Overpopulation of certain species

b) Climate change

Q32. What is the main purpose of biodiversity hotspots?

a) Areas with the highest number of invasive species

b) Regions with the highest species diversity and high threat of habitat loss

c) Areas with the lowest biodiversity

d) Places where new species are most likely to evolve

b) Regions with the highest species diversity and high threat of habitat loss

Q33. What is the term for the complete disappearance of a species from Earth?

a) Extinction

b) Extermination

c) Elimination

d) Eradication

a) Extinction

Q34. What is the term for the variety of genes within a species?

a) Ecosystem diversity

b) Genetic diversity

c) Species diversity

d) Ecological diversity

b) Genetic diversity

Q35. How does biodiversity contribute to ecosystem resilience?

a) By reducing species interactions

b) By decreasing habitat variability

c) By increasing ecosystem stability

d) By limiting species adaptations

(b) c) By increasing ecosystem stability

Q36. Which of the following is an example of an indirect value provided by biodiversity?

a) Timber production

b) Climate regulation

c) Medicinal resources

d) Soil fertility

b) Climate regulation

Q37. What is the term for the process of the movement and exchange of genes between populations of the same species?

a) Gene drift

b) Genetic differentiation

c) Gene flow

d) Genetic bottlenecking

c) Gene flow

Q38. Which ecological concept refers to the variety of niches, trophic levels, and ecological processes within an ecosystem?

a) Ecological succession

b) Ecological equilibrium

c) Ecological diversity

d) Ecological niche

c) Ecological diversity

Q39. Which factor contributes significantly to the phenomenon of habitat fragmentation?

a) Overpopulation of species

b) Climate change

c) Deforestation

d) Decreased biodiversity

c) Deforestation

Q40. What is the term for the process where species, due to environmental changes, gradually lose their adaptations?

a) Extinction

b) Natural selection

c) Speciation

d) Evolutionary reversal

d) Evolutionary reversal

What is biodiversity and why is it important?

Biodiversity refers to the variety of life forms, including species, genes, and ecosystems, within a specific area. It’s crucial for ecosystem stability, providing essential resources like food, medicine, and contributing to ecological balance and resilience

How does biodiversity loss affect humans?

Loss of biodiversity can have severe consequences for humans, impacting food security, diminishing access to clean water, reducing the effectiveness of medicines derived from natural sources, and increasing vulnerability to natural disasters due to weakened ecosystems.

What are the main causes of biodiversity loss?

Human activities like deforestation, habitat destruction, pollution, climate change, over-exploitation of resources, introduction of invasive species, and unsustainable agricultural practices are the primary causes of biodiversity loss.

Can biodiversity loss be reversed?

While some impacts can be mitigated through conservation efforts, restoring biodiversity to its original state can be challenging once lost. Efforts focus on conservation, habitat restoration, reforestation, and sustainable resource management to slow down and potentially reverse biodiversity decline.

How can individuals contribute to biodiversity conservation?

Individuals can make a difference through small actions like supporting sustainable products, reducing waste, advocating for conservation policies, participating in local conservation initiatives, and educating others about the importance of biodiversity.

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