Chapter 13: Biodiversity and its Conservation — Online MCQ Test
BIOLOGY · Grade 12 · CBSE(NCERT)
Practice Chapter 13: Biodiversity and its Conservation with a free chapter-wise online MCQ test.
This chapter covers: Biodiversity Species Diversity Genetic Diversity Ecosystem Diversity Conservation In Situ Conservation Ex Situ Conservation Biosphere Reserve National Park Wildlife Sanctuary Seed....
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 13: Biodiversity and its Conservation — Important Questions & Answers
Biodiversity refers to the:
- A. Variety of life forms and their interactions at all levels
- B. Number of only plant species in an area
- C. Number of only animal species in a forest
- D. Uniformity of organisms in an ecosystem
Answer: A. Variety of life forms and their interactions at all levels
Biodiversity includes the variety of living organisms at genetic, species and ecosystem levels. It also includes their ecological roles and interactions.
Biodiversity includes the variety of living organisms at genetic, species and ecosystem levels. It also includes their ecological roles and interactions.
The term biodiversity was popularised by:
- A. Charles Darwin
- B. Edward Wilson
- C. Robert May
- D. Alexander von Humboldt
Answer: B. Edward Wilson
Edward Wilson, the sociobiologist, popularised the term biodiversity. He described biodiversity as the combined diversity at all levels of biological organisation.
Edward Wilson, the sociobiologist, popularised the term biodiversity. He described biodiversity as the combined diversity at all levels of biological organisation.
Which of the following is NOT a level of biodiversity described in NCERT?
- A. Genetic diversity
- B. Species diversity
- C. Ecosystem diversity
- D. Atmospheric diversity
Answer: D. Atmospheric diversity
The three main levels of biodiversity are genetic, species and ecosystem diversity. Atmospheric diversity is not a recognised level of biodiversity in this chapter.
The three main levels of biodiversity are genetic, species and ecosystem diversity. Atmospheric diversity is not a recognised level of biodiversity in this chapter.
Conservation of biodiversity in its natural habitat is called:
- A. Ex situ conservation
- B. In situ conservation
- C. Cryopreservation
- D. Tissue culture
Answer: B. In situ conservation
In situ conservation means conserving organisms in their natural habitats. Examples include national parks, sanctuaries and biosphere reserves.
In situ conservation means conserving organisms in their natural habitats. Examples include national parks, sanctuaries and biosphere reserves.
The Western Ghats have a greater number of amphibian species than the Eastern Ghats. This is an example of:
- A. Genetic diversity
- B. Species diversity
- C. Molecular diversity
- D. Artificial selection
Answer: B. Species diversity
Species diversity is the variety of species in a given region. Comparing amphibian species richness in two regions represents species diversity.
Species diversity is the variety of species in a given region. Comparing amphibian species richness in two regions represents species diversity.
Which statement best distinguishes a wildlife sanctuary from a national park?
- A. A sanctuary permits hunting, while a national park does not
- B. A sanctuary may allow some regulated human activities, while a national park is more strictly protected
- C. A national park is only for plants, while a sanctuary is only for animals
- D. A sanctuary is an ex situ method, while a national park is an in situ method
Answer: B. A sanctuary may allow some regulated human activities, while a national park is more strictly protected
Both sanctuaries and national parks are in situ conservation areas. National parks generally have stricter protection, while some regulated activities may be allowed in sanctuaries.
Both sanctuaries and national parks are in situ conservation areas. National parks generally have stricter protection, while some regulated activities may be allowed in sanctuaries.
Which option correctly matches the conservation method with its example?
- A. In situ conservation - botanical garden
- B. Ex situ conservation - national park
- C. In situ conservation - biosphere reserve
- D. Ex situ conservation - sacred grove
Answer: C. In situ conservation - biosphere reserve
A biosphere reserve conserves organisms in their natural habitat, so it is an in situ method. Botanical gardens and seed banks are ex situ methods.
A biosphere reserve conserves organisms in their natural habitat, so it is an in situ method. Botanical gardens and seed banks are ex situ methods.
The Amazon rainforest is being converted into soybean fields and grasslands for raising beef cattle. Which two biodiversity threats are most closely associated with this process?
- A. Habitat loss and fragmentation
- B. Cryopreservation and seed banking
- C. Co-extinction and artificial hybridisation
- D. Sacred groves and national parks
Answer: A. Habitat loss and fragmentation
Clearing rainforest destroys natural habitats and divides continuous forests into smaller fragments. NCERT identifies habitat loss and fragmentation as major causes of biodiversity loss.
Clearing rainforest destroys natural habitats and divides continuous forests into smaller fragments. NCERT identifies habitat loss and fragmentation as major causes of biodiversity loss.
According to Robert May's global estimate discussed in NCERT, the total number of species on Earth is closest to:
- A. 70,000
- B. 7 million
- C. 17,000
- D. 700 million
Answer: B. 7 million
Robert May estimated that the global number of species is about 7 million. This estimate is much higher than the number of species formally described.
Robert May estimated that the global number of species is about 7 million. This estimate is much higher than the number of species formally described.
Which statement about biodiversity hotspots is correct according to NCERT?
- A. They cover less than 2 percent of Earth's land area but contain very high biodiversity
- B. They are regions with low endemism and no threat
- C. They are always ex situ conservation centres
- D. They include only marine ecosystems and no terrestrial areas
Answer: A. They cover less than 2 percent of Earth's land area but contain very high biodiversity
NCERT states that biodiversity hotspots cover less than 2 percent of Earth's land area but support a large proportion of plant and vertebrate species. They are identified by high endemism and threat.
NCERT states that biodiversity hotspots cover less than 2 percent of Earth's land area but support a large proportion of plant and vertebrate species. They are identified by high endemism and threat.