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Biology · BIODIVERSITY AND CONSERVATION
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Biology · BIODIVERSITY AND CONSERVATION
Which of the following ecological phenomena provides an authentic example of co-extinction?
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The species richness in the Amazonian rain forest includes approximately:
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The ongoing sixth episode of mass extinction ('Sixth Extinction') is fundamentally distinct from the earlier five mass extinction episodes primarily because:
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Match List-I with List-II: List-I (Level of Diversity) List-II (Example / Characteristic) A Genetic diversity I Western Ghats have greater amphibian species than Eastern Ghats B Species diversity II Different concentrations of reserpine in Rauwolfia C Ecological diversity III Estimated at approximately 7 million species globally D Global species richness (Robert May) IV India has more biomes/ecosystems compared to Norway Choose the correct answer from the options given below:
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Match List-I with List-II: List-I (Recently Extinct Organism) List-II (Geographical Origin) A Dodo I Australia B Quagga II Russia C Thylacine III Mauritius D Steller's Sea Cow IV Africa Choose the correct answer from the options given below:
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In the 'rivet popper hypothesis' proposed by Paul Ehrlich, removal of rivets that hold the wings of an airplane corresponds to:
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): On a logarithmic scale, the species-area relationship across a wide variety of taxa is a straight line. Reason (R): Species richness increases with increasing explored area without any upper limit. In the light of the above statements, choose the correct answer from the options given below:
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Conventional taxonomic methods are considered unsuitable for identifying which group of organisms due to difficulties in culturing them under laboratory conditions?
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Conventional taxonomic methods are considered unsuitable for identifying microbial biodiversity primarily because:
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Given below are two statements: Statement I: The relationship between species richness and area for a wide variety of taxa turns out to be a rectangular hyperbola on a linear scale. Statement II: On a logarithmic scale, the species-area relationship is described by the equation \( \log S = \log Z + C \log A \). In the light of the above statements, choose the most appropriate answer from the options given below:
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Ecologists have proposed several hypotheses to explain why tropical latitudes harbor higher species richness than temperate regions. Consider the following statements: (A) Tropical regions have remained relatively undisturbed by frequent glaciations for millions of years. (B) Tropical environments exhibit extreme seasonal variations and unpredictable climatic extremes. (C) Tropical environments promote niche specialization through relatively constant and predictable conditions. (D) Higher solar energy availability in tropics contributes to higher productivity. Which of the above statements are correct?
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In which of the following states are the sacred groves known as 'Khasi and Jaintia Hills' located, which serve as the last refuges for a large number of rare and threatened plants?
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Which of the following is NOT an ecological consequence directly associated with the loss of biodiversity in a given region?
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Consider the following statements regarding global biodiversity: (A) Animals constitute more than 70% of all recorded species. (B) Plants (including algae, fungi, bryophytes, gymnosperms, and angiosperms) comprise no more than 22% of the total. (C) Insects make up more than 70% of the total animal species. (D) The number of fungi species in the world is less than the combined total of fishes, amphibians, reptiles, and mammals. Which of the above statements are correct?
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Among vertebrates, which taxonomic group comprises the largest number of described species?
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A biological comparison shows that a tropical forest in Ecuador contains up to how many times more vascular plant species than an equal area in the Midwest of the USA?
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Biodiversity hotspots are regions characterized by exceptionally high levels of species richness and high degree of endemism. Reason (R): Strictly protecting biodiversity hotspots across the world can reduce the ongoing mass extinctions by almost 30 percent. In the light of the above statements, choose the correct answer from the options given below:
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Identify the pair of organisms that succumbed to extinction specifically due to anthropogenic over-exploitation within the last 500 years:
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Why do tropical regions harbor significantly higher species diversity compared to temperate regions?
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Which of the following ecosystem services is appropriately categorized under the 'broadly utilitarian' argument for biodiversity conservation?
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Communities with higher species richness generally show less year-to-year variation in total biomass. Reason (R): David Tilman's long-term ecosystem outdoor plots demonstrated that increased diversity contributes to higher productivity. In the light of the above statements, choose the correct answer from the options given below:
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The genetic variation shown by the medicinal plant Rauwolfia vomitoria across different Himalayan ranges is manifested in terms of:
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