Diversity of Organisms and Views on Evolution
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There is truly a great diversity of organisms living on the Earth. It is said that the number of species recorded so far may be as many as one million and several hundred thousand. Among these, more than one million are animals, of which the majority (approximately 700 thousand species) are insects. The kinds of plants including fungi and algae number about 500 thousand. In addition, more than 2000 species of bacteria (including cyanobacteria) are known.