ScienceJohn Michels (Journalist) 1955 |
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Стр. 5
... natural selection of ad- vantageous mutations in the genes , means must have been evolved for transforming into the materials of living things substances that required an ever more extended series of steps for the conversion process ...
... natural selection of ad- vantageous mutations in the genes , means must have been evolved for transforming into the materials of living things substances that required an ever more extended series of steps for the conversion process ...
Стр. 8
... Natural selection has decreased the fertility because , with too high a pressure toward population increase , the well - being and efficiency of the organisms are so reduced as actually to lower the potential of the species to undergo ...
... Natural selection has decreased the fertility because , with too high a pressure toward population increase , the well - being and efficiency of the organisms are so reduced as actually to lower the potential of the species to undergo ...
Стр. 45
... natural pigments . Furthermore , when the dopa solution is added to the ashes of hair of different coloration , color solutions similar to extractions of natural pigments are easily obtained . An analogous phenomenon may be found also ...
... natural pigments . Furthermore , when the dopa solution is added to the ashes of hair of different coloration , color solutions similar to extractions of natural pigments are easily obtained . An analogous phenomenon may be found also ...
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ANNUAL REVIEW | 166 |
PSYCHOLOGY | 189 |
Child Psychology M RadkeYarrow and L J Yarrow | 220 |
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