Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Том 69American Philosophical Society, 1930 |
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Сторінка 56
... higher optimum temperature than have the higher plants . The lower limit of temperature for the growth of higher plants is reached somewhere around o ° C. , as is exem- plified by certain Alpine plants which pierce their flowers through ...
... higher optimum temperature than have the higher plants . The lower limit of temperature for the growth of higher plants is reached somewhere around o ° C. , as is exem- plified by certain Alpine plants which pierce their flowers through ...
Сторінка 57
... higher latitudes , even if the temperature here has become much lower ) . Also in the more elevated , cooler highlands of such countries like Java , where the sun stands overhead almost all the year round . While higher plants need much ...
... higher latitudes , even if the temperature here has become much lower ) . Also in the more elevated , cooler highlands of such countries like Java , where the sun stands overhead almost all the year round . While higher plants need much ...
Сторінка 380
... higher plants it is a simpler problem than with higher animals . A single plant may be multiplied vegetatively , as by cuttings , and parts of only one plant used in the experiment . In most higher plants the two sexes are present in ...
... higher plants it is a simpler problem than with higher animals . A single plant may be multiplied vegetatively , as by cuttings , and parts of only one plant used in the experiment . In most higher plants the two sexes are present in ...
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facing 131 | 4 |
Ten Unsolved Mysteries of the Stellar Universe By HARLOU | 13 |
THE AMERICAN PHILOSOPHICAL SOCIETY HELD AT PHILADELPHIA | 17 |
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