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Chapter 7 Conserving Biological Resources Chapter 7 Conserving Biological Resources Value of Wild Species Biodiversity Value of Wild Species Biological Wealth About million species of plants, animals, and microbes have been examined, named, and classified, but scientists estimate that between 4 million and 112 million additional species have not yet been systematically explored . Two Kinds of Value ?instrumental value: its existence or use benefits some other entity ?intrinsic value: it has value for its own sake The value of natural species ?S