The Encyclopedia Americana, Volume 7Grolier, 1988 - Encyclopedias and dictionaries |
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Page 133
... plants that once flourished in some areas of the earth , since examination of coal through a microscope shows various kinds of plant cell structure . But any description of the circumstances under which these plants grew , died , and ...
... plants that once flourished in some areas of the earth , since examination of coal through a microscope shows various kinds of plant cell structure . But any description of the circumstances under which these plants grew , died , and ...
Page 134
... PLANT DEBRIS WATER SEDIMENTS PEAT WATER SEDIMENTARY ROCKS COAL plants ) were in part retained in the plant debris . Along with the wind- and water - borne impuri- ties , they remained to become the ash that is left when coal burns . In ...
... PLANT DEBRIS WATER SEDIMENTS PEAT WATER SEDIMENTARY ROCKS COAL plants ) were in part retained in the plant debris . Along with the wind- and water - borne impuri- ties , they remained to become the ash that is left when coal burns . In ...
Page 580
... plants in having multiple seed leaves ( cotyledons ) ; the number varies from 2 to 15 , in contrast to the flowering plants , which have 1 ( monocotyledonous ) or 2 ( dicotyledonous ) . Cultivation . There are few plant groups more ...
... plants in having multiple seed leaves ( cotyledons ) ; the number varies from 2 to 15 , in contrast to the flowering plants , which have 1 ( monocotyledonous ) or 2 ( dicotyledonous ) . Cultivation . There are few plant groups more ...
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