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Even with detailed knowledge about an area, geologists cannot easily locate stores of underground na...

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studies existing tribes.  studies ancient way of living.  studies preindustrial societies.  studies plants.  
the invention of agricultural implements and machinery  the development of a system of names for plants  the discovery of grasses that could be harvested and replaced  the changing diets of early humans  
make the passage more poetic  cite examples of plants that are attractive  give botanical examples that all readers will recognize  illustrate the diversity of botanical life  
even if  in case   so that  as though  
even if    in case    so that    as though  
even if    so that    in case    as though  
even if    in case   so that    as though  
probably had extensive knowledge of plants  thought there was no need to cultivate crops  did not enjoy the study of botany  placed great importance on the ownership of property  
varieties  maps  supplies  shops  
there is no clear way to determine the extent of our ancestors’ knowledge of plants  it is not surprising that early humans had a detailed knowledge of plants  it is reasonable to assume that our ancestors behaved very much like people in preindustrial societies  human knowledge of plants is well organized and very detailed  

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