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Biodiversity and Conservation

Levels of Biodiversity Practice Questions

20 free Levels of Biodiversity practice questions for the NCERT Biology. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.

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Question 1 of 20 Medium

Which level of biodiversity is represented by the medicinal plant Rauwolfia vomitoria growing in different Himalayan ranges?

  1. A Species diversity
  2. B Genetic diversity
  3. C Ecosystem diversity
  4. D Ecological diversity

Correct answer: Genetic diversity

Rauwolfia vomitoria shows variations in the potency and concentration of the active chemical reserpine due to genetic variation. This is a classic NCERT example of genetic diversity within a single species.

Question 2 of 20 Medium

The presence of a large number of amphibian species in the Western Ghats compared to the Eastern Ghats is an example of:

  1. A Genetic diversity
  2. B Ecosystem diversity
  3. C Species diversity
  4. D Biogeographical diversity

Correct answer: Species diversity

Species diversity is measured by the variety of species within a region. The higher number of amphibian species in the Western Ghats specifically illustrates diversity at the species level.

Question 3 of 20 Medium

India has more than 50,000 genetically different strains of rice. This is an example of:

  1. A Species diversity
  2. B Genetic diversity
  3. C Ecosystem diversity
  4. D Landscape diversity

Correct answer: Genetic diversity

Genetic diversity refers to the variation of genes within a species. The vast number of rice strains in India demonstrates high genetic variability within the single species Oryza sativa.

Question 4 of 20 Medium

Which of the following countries would likely have a higher ecosystem diversity than a Scandinavian country like Norway?

  1. A Sweden
  2. B Iceland
  3. C India
  4. D Denmark

Correct answer: India

India possesses a wide variety of ecosystems including deserts, rain forests, mangroves, coral reefs, wetlands, estuaries, and alpine meadows. This variety makes its ecosystem diversity much higher than that of Norway.

Question 5 of 20 Medium

The term 'Biodiversity' was popularized by which sociobiologist?

  1. A Ensures all individuals within a species are identical
  2. B Allows the species to adapt to changing conditions
  3. C Significantly increases the overall mutation rate
  4. D Promotes competition between different species

Correct answer: Allows the species to adapt to changing conditions

Genetic diversity provides the raw material for adaptation. It allows populations to survive environmental stress, diseases, and climate change through natural selection.

Question 6 of 20 Medium

Genetic diversity is beneficial for a species because it:

  1. A Genetic diversity within a species
  2. B Species diversity in a community
  3. C Ecosystem diversity
  4. D Alpha diversity at local scale

Correct answer: Ecosystem diversity

Ecosystem diversity refers to the variety of habitats, biotic communities, and ecological processes in the biosphere. Deserts and mangroves represent distinct ecological niches and systems.

Question 7 of 20 Medium

Deserts, rain forests, and mangroves are components of:

  1. A Genetic diversity
  2. B Species diversity
  3. C Ecosystem diversity
  4. D Alpha diversity

Correct answer: Ecosystem diversity

Ecosystem diversity refers to the variety of habitats, biotic communities, and ecological processes in the biosphere. Deserts and mangroves represent distinct ecological niches and systems.

Question 8 of 20 Medium

Which of the following is the correct hierarchical order of biodiversity levels from smallest to largest scale?

  1. A Species -> Genetic -> Ecosystem
  2. B Ecosystem -> Species -> Genetic
  3. C Genetic -> Species -> Ecosystem
  4. D Genetic -> Ecosystem -> Species

Correct answer: Genetic -> Species -> Ecosystem

Biodiversity starts at the molecular/gene level (genetic), moves to the group of interbreeding individuals (species), and finally encompasses the community and its environment (ecosystem).

Question 9 of 20 Medium

If a new disease wipes out all but one strain of a crop, the crop has lost its:

  1. A Species diversity
  2. B Ecosystem diversity
  3. C Genetic diversity
  4. D Clonal diversity

Correct answer: Genetic diversity

The variety of strains within a single crop species represents its genetic diversity. Losing these strains reduces the gene pool available for future resistance and breeding.

Question 10 of 20 Medium

Species richness is defined as:

  1. A The relative abundance and evenness of each species
  2. B The total number of species present per unit area
  3. C The genetic variation found within a single species
  4. D The overall variety of ecosystems present in a region

Correct answer: The total number of species present per unit area

Species richness is a simple count of the number of different species present in a defined geographical area or community.

Question 11 of 20 Medium

Ecological diversity is high in India due to the presence of:

  1. A Only tropical rain forests across the subcontinent
  2. B Vast monoculture plantations for agriculture
  3. C Diverse habitats from alpine meadows to coral reefs
  4. D A uniform climate and single vegetation type

Correct answer: Diverse habitats from alpine meadows to coral reefs

India's geography includes a wide array of biomes and habitats, ranging from high-altitude alpine meadows to coastal coral reefs, contributing to high ecosystem (ecological) diversity.

Question 12 of 20 Medium

The active chemical 'Reserpine' is obtained from which plant?

  1. A Atropa belladonna
  2. B Rauwolfia vomitoria
  3. C Papaver somniferum
  4. D Cinchona officinalis

Correct answer: Rauwolfia vomitoria

Reserpine is the medicinal alkaloid extracted from Rauwolfia vomitoria. The variation in its concentration is a key example of genetic diversity.

Question 13 of 20 Medium

Which of the following is NOT a level of biodiversity described by Edward Wilson?

  1. A Genetic diversity
  2. B Species diversity
  3. C Ecosystem and habitat diversity
  4. D Population diversity

Correct answer: Population diversity

Edward Wilson categorized biodiversity into three main levels: genetic, species, and ecological/ecosystem diversity. Population diversity is generally considered a subset of genetic or species diversity.

Question 14 of 20 Medium

How many varieties of mango are estimated to be found in India?

  1. A More than 50,000
  2. B Exactly 100
  3. C More than 1,000
  4. D Less than 500

Correct answer: More than 1,000

According to NCERT, India has more than 1,000 varieties of mango, which serves as a prime example of genetic diversity within the species Mangifera indica.

Question 15 of 20 Medium

A decrease in species evenness while species richness remains the same would result in:

  1. A Increased biodiversity
  2. B Decreased biodiversity
  3. C Unchanged biodiversity
  4. D Increased genetic diversity

Correct answer: Decreased biodiversity

Biodiversity takes into account both richness and evenness. If one species becomes overly dominant (lower evenness), the overall diversity of the community is considered lower.

Question 16 of 20 Medium

Which level of diversity is most likely to be affected by the extinction of a single endemic species?

  1. A Genetic diversity only
  2. B Species diversity only
  3. C Ecosystem diversity only
  4. D Both genetic and species diversity

Correct answer: Both genetic and species diversity

When a species goes extinct, it is removed from the species count (species diversity) and its unique set of genes is lost forever (genetic diversity). Both levels are therefore affected by the extinction of an endemic species.

Question 17 of 20 Medium

Coral reefs and estuaries are examples of:

  1. A Species richness of a habitat
  2. B Ecosystem diversity
  3. C Genetic variation in populations
  4. D Biotic potential of organisms

Correct answer: Ecosystem diversity

Coral reefs and estuaries represent complex ecological systems with unique physical conditions and biological communities, illustrating ecosystem diversity.

Question 18 of 20 Medium

The diversity of all the living organisms in the biosphere is called:

  1. A Ecological succession
  2. B Biogeochemistry
  3. C Biodiversity
  4. D Biotic community

Correct answer: Biodiversity

Biodiversity is the totality of genes, species, and ecosystems of a region, representing the variety of life at all levels of biological organization.

Question 19 of 20 Medium

Which level of biodiversity is primarily concerned with the variations in the gene pool of a population?

  1. A Genetic diversity
  2. B Species diversity
  3. C Ecological diversity
  4. D Community diversity

Correct answer: Genetic diversity

Genetic diversity focuses on the heritable variation within and between populations of organisms, which constitutes the total gene pool.

Question 20 of 20 Medium

A region with many different types of habitats like wetlands, grasslands, and forests shows high:

  1. A Genetic diversity within populations
  2. B Species evenness across zones
  3. C Ecosystem diversity
  4. D Taxonomic diversity at genus level

Correct answer: Ecosystem diversity

Ecosystem diversity is the variety of different habitats and ecological processes present in a large area or at a global scale.

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