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Which one of the following provides the best estimate of the world’s biological diversity? (a) of about 10 million species probably alive today, some 20 species are lost every day, most of them unknown because no more than half a million have yet been actually identified by scientists (b) of about 30 million living species, some 50 are lost every day, most of them unknown because no more than one million have been actually identified (c) of about 45 million living species, some 100 are lost every day, most of them unknown because no more than 1.5 million have been actually identified (d) of about 75 million living species, some 500 are lost every day, most of them unknown because no more than 3 million have been actually identified |
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Answer» (a) of about 10 million species probably alive today, some 20 species are lost every day, most of them unknown because no more then half a million have yet been actually identified by scientists. |
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