ScienceJohn Michels (Journalist) 1941 |
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Page 44
... species of aquatic vegetation in the production of A. quadrimaculatus . Quantitative studies were undertaken to determine the relative importance of individual aquatic species in the production of this mosquito . Twenty species of ...
... species of aquatic vegetation in the production of A. quadrimaculatus . Quantitative studies were undertaken to determine the relative importance of individual aquatic species in the production of this mosquito . Twenty species of ...
Page 234
... species of Angiosperms . For example , according to a dozen books examined , the number of species of all Angiosperms varies from 133,000 to 175,000 ; of Dicotyledons 100,000 to 140,000 ; and of Monocotyledons 24,000 to 35,000 . The ...
... species of Angiosperms . For example , according to a dozen books examined , the number of species of all Angiosperms varies from 133,000 to 175,000 ; of Dicotyledons 100,000 to 140,000 ; and of Monocotyledons 24,000 to 35,000 . The ...
Page 448
... species of infusoria multiplication occurs more rapidly when other individuals of the species are present . It seemed that the individuals must secrete materials which pass into the water and stimulate other individuals to reproduce ...
... species of infusoria multiplication occurs more rapidly when other individuals of the species are present . It seemed that the individuals must secrete materials which pass into the water and stimulate other individuals to reproduce ...
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