Questions about the three levels of biodiversity: genetic diversity within species, species diversity within ecosystems, and ecological diversity across habitats. Tests understanding of their importance and measurement.
Biodiversity has three levels: genetic diversity, species diversity, and ecosystem diversity.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Biodiversity - Levels - Genetic Species Ecological
Ecosystem services include nutrient cycling, water purification, pollination, soil formation, and climate regulation, all of which are essential for life.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Biodiversity - Levels - Genetic Species Ecological
Biodiversity hotspots are regions rich in endemic species that face a high degree of habitat loss and therefore require priority conservation.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Biodiversity - Levels - Genetic Species Ecological
India accounts for about 8.1% of the world's described species and is one of the 12 mega-diverse countries.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Biodiversity - Levels - Genetic Species Ecological
Robert May estimated that the global species diversity is about 7 million, whereas only about 1.5–1.8 million species have been described.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Biodiversity - Levels - Genetic Species Ecological
Paul Ehrlich's rivet popper hypothesis states that the gradual loss of species weakens ecosystem functioning, just as removing rivets weakens an aircraft.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Biodiversity - Levels - Genetic Species Ecological
According to NCERT, the Western Ghats have a greater amphibian species diversity than the Eastern Ghats.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Biodiversity - Levels - Genetic Species Ecological
Robert May estimated that Earth harbours about 7 million species, although only about 1.7–1.8 million have been identified and described.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Biodiversity - Levels - Genetic Species Ecological
According to NCERT, tropical rainforests such as the Amazon have high biodiversity because they have had a long evolutionary history, a relatively stable climate, and high solar energy availability.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Biodiversity - Levels - Genetic Species Ecological
Ecosystem diversity refers to the variety of habitats and ecosystems, such as forests, deserts, wetlands, and coral reefs.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Biodiversity - Levels - Genetic Species Ecological
Genetic diversity enables populations to adapt to changing environmental conditions and is essential for evolution.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Biodiversity - Levels - Genetic Species Ecological
NCERT groups biodiversity values into narrowly utilitarian, broadly utilitarian, and ethical values. Ethical value recognizes the intrinsic right of every species to exist.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Biodiversity - Levels - Genetic Species Ecological
