Q. No.It has taken millions of years of …….to accumulate this rich diversity in nature but we could lose all that wealth in …….if the present rates of species losses continue.
(1) Evolution, less than 100 years
(2) Evolution, less than two centuries
(3) Founders effect, less than two centuries
(4) Founders effect, less than one century
(1) Evolution, less than 100 years
(2) Evolution, less than two centuries
(3) Founders effect, less than two centuries
(4) Founders effect, less than one century
The total number of plant and animal species described so far is slightly more than 1.5 million. This is reported by
(1) IUCN- 2004
(2) IUN-2006
(3) IUCN-2006
(4) IUN-2004
. For many taxonomic groups, species inventories are more complete in
(1) Temperate countries
(2) Tropical countries
(3) Grasslands
(4) Both B and C
. According to extreme estimates, which say that there is 20 to 50 million global species diversity which is based on
(1) Species richness of insects
(2) Species richness of Arthropods
(3) Species evenness of insects
(4) Species evenness of Arthropods
According to Robert May, the global species diversity is
(1) About 20 billion
(2) About 7 billion
(3) 7 million
(4) About 20 million
Which of the following statement is wrong about species diversity?
(1) More than 70 per cent of all the species recorded are animals
(2) Algae and fungi comprise no more than 22 per cent of the total
(3) Here in this estimate, plants include algae, fungi, bryophyte, gymnosperms and angiosperms
(4) 70 per cent of the total animals come from insecta
Among animals, which of the following is the most species rich taxonomic group?
(1) Insects
(2) Molluscs
(3) Crustacean
(4) Other animal groups
Which of the following statement is true about biodiversity of Earth?
(1) The number of fungi species in this world is more than the combined total of the species of fishes, amphibians, reptiles and mammals
(2) The number of fungi species is less than combined total of the species of fishes
(3) The number of fungi species is less than combined total of the species of amphibians and reptiles
(4) The number of fungi species is less than combined total of the species of mammals and birds
Which of the following organisms are not estimated in terms of diversity?
(1) Prokaryotes
(2) Plants
(3) Fungi
(4) Mosses
. Prokaryotes have not been estimated in terms of biodiversity. Which of the following reasons does not hold true?
(1) Conventional taxonomic methods are not suitable for identifying microbial species
(2) Many species are simply not culturable under laboratory conditions
(3) Lichenes do not allow them to be assessed because of close association
(4) Both A and C
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