10
Question
Read the following statements and state whether they are true (T) or false (F).
(I) According to Robert May, the total number of different species on earth is around 5 million
(II) The currently available records on the identified species tell us that more than 70% of all the recorded species are animals.
(III) The most species-rich taxonomic group among animals is class Insecta
Choose the correct option:
Read the following statements and state whether they are true (T) or false (F).
(I) According to Robert May, the total number of different species on earth is around 5 million
(II) The currently available records on the identified species tell us that more than 70% of all the recorded species are animals.
(III) The most species-rich taxonomic group among animals is class Insecta
Choose the correct option:
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Solution
The correct option is A I - F, II - T, III - T
Statement I is false:
According to the reports by IUCN - International Union for the Conservation of Nature (2004), more than 1.5 million different species of living organisms have been identified and described by biologists so far. But it is difficult to achieve a complete inventory of all the biological species that exist. Estimates of global species diversity have been made by biologists all over the world and vary widely, some being mere educated guesses. A scientifically sound and more conservative estimate given by Robert May estimates the global species diversity to be at around 7 million.
Statement II and III true:
The estimates made by Robert May state that only 22% of the existing species on earth have been described so far and the rest are yet to be identified. The currently available records on the identified species tell us that more than 70% of all the recorded species are animals and amongst animals, more than 70% of the species belong to the class Insecta. This indicates that out of every 10 animal species on this planet, 7 are insects. This makes the insects the most species-rich taxonomic group.
Statement I is false:
According to the reports by IUCN - International Union for the Conservation of Nature (2004), more than 1.5 million different species of living organisms have been identified and described by biologists so far. But it is difficult to achieve a complete inventory of all the biological species that exist. Estimates of global species diversity have been made by biologists all over the world and vary widely, some being mere educated guesses. A scientifically sound and more conservative estimate given by Robert May estimates the global species diversity to be at around 7 million.
Statement II and III true:
The estimates made by Robert May state that only 22% of the existing species on earth have been described so far and the rest are yet to be identified. The currently available records on the identified species tell us that more than 70% of all the recorded species are animals and amongst animals, more than 70% of the species belong to the class Insecta. This indicates that out of every 10 animal species on this planet, 7 are insects. This makes the insects the most species-rich taxonomic group.
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