Biodiversity and Conservation Practice Questions
Class 12 · Biology · 3097 free MCQs with instant results and detailed explanations.
3097
Total
921
Easy
1551
Medium
625
Hard
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Topics in Biodiversity and Conservation
Conservation Strategies
1059
Loss of Biodiversity
1019
Biodiversity
1019
Sample Questions from Biodiversity and Conservation
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What term describes the variety of life on Earth?
A.
Biodiversity
B.
Ecosystem
C.
Ecology
D.
Habitat
Show Answer & Explanation
Correct Answer: A
Biodiversity refers to the variety of living organisms in a particular habitat or on Earth as a whole.
Q2
Easy
Which of the following is NOT a level of biodiversity?
A.
Genetic diversity
B.
Species diversity
C.
Ecosystem diversity
D.
Species complexity
Show Answer & Explanation
Correct Answer: D
Species complexity is not a recognized level of biodiversity; the three levels are genetic, species, and ecosystem diversity.
Q3
Easy
What is the main cause of biodiversity loss today?
A.
Climate change
B.
Pollution
C.
Habitat destruction
D.
Invasive species
Show Answer & Explanation
Correct Answer: C
Habitat destruction is considered the primary cause of biodiversity loss, leading to extinction and fragmentation.
Q4
Medium
Which of the following ecosystems has the highest biodiversity?
A.
Tropical rainforest
B.
Desert
C.
Tundra
D.
Temperate forest
Show Answer & Explanation
Correct Answer: A
Tropical rainforests are known for their rich variety of species, including plants, animals, and microorganisms.
Q5
Medium
What is the primary reason for the loss of biodiversity in most ecosystems?
A.
Climate change
B.
Habitat destruction
C.
Invasive species
D.
Pollution
Show Answer & Explanation
Correct Answer: B
Habitat destruction, often due to human activities like deforestation and urbanization, is the leading cause of biodiversity loss.
Q6
Medium
Which of the following measures is NOT effective in conserving biodiversity?
A.
Establishing protected areas
B.
Promoting monoculture
C.
Restoration of habitats
D.
Regulating hunting and fishing
Show Answer & Explanation
Correct Answer: B
Monoculture promotes the dominance of a single species, thus reducing overall biodiversity rather than conserving it.
Q7
Medium
Which term describes the variety of different species within a given area?
A.
Genetic diversity
B.
Species diversity
C.
Ecosystem diversity
D.
Functional diversity
Show Answer & Explanation
Correct Answer: B
Species diversity refers to the variety of different species present in a particular habitat or ecosystem.
Q8
Hard
Which of the following statements best describes the concept of 'biodiversity hotspots'?
A.
Regions with an exceptionally high level of endemism and significant habitat loss.
B.
Areas with the highest number of species irrespective of their conservation status.
C.
Locations where only endemic species are found.
D.
Regions with balanced ecosystems and no invasive species.
Show Answer & Explanation
Correct Answer: A
'Biodiversity hotspots' are defined as regions that are both rich in endemic species and have lost at least 70% of their original habitat, making option A the correct choice.
Q9
Hard
Which of the following is NOT a direct benefit of biodiversity?
A.
Provision of raw materials.
B.
Regulation of climate.
C.
Increase in atmospheric CO2 levels.
D.
Enhancement of ecosystem resilience.
Show Answer & Explanation
Correct Answer: C
Increasing atmospheric CO2 levels is a negative impact, not a benefit of biodiversity, making C the correct answer.
Q10
Hard
The term 'alpha diversity' refers to which of the following?
A.
The diversity of species within a specific area or ecosystem.
B.
The variation in species composition across different ecosystems.
C.
The total diversity of species across the globe.
D.
The genetic diversity within a single species.
Show Answer & Explanation
Correct Answer: A
Alpha diversity measures the number of species in a specific location or habitat, making A the correct answer.
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Biodiversity and Conservation — Class 12 Biology Practice Questions Online
This page contains 3097 practice MCQs for the chapter Biodiversity and Conservation in Class 12 Biology. The questions are organized by difficulty — 921 easy, 1551 medium, 625 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 3 topics, giving you comprehensive coverage of the entire chapter.