. Effects of the rays of radium on plants. Plants. 236 EFFECTS OF EXPOSING GERM-CELLS TO RAYS OF RADIUM in mind it seems almost self-evident that such a natural group of higher plants may not be artificially produced in the laboratory, nor, indeed, within the narrow confines of an experimental garden. But whether we may artificially produce a parent or ancestor of. Fig. 65. Onagra biennis. Permanently x\rrested Development. The Ovary, after Pollination, was exposed for 53 Hours to the Rays from Radium Bromide (10,000 X) Contained in a sealed Glass Tube. Cf. figure 66. a species is quite anothe
. Effects of the rays of radium on plants. Plants. 236 EFFECTS OF EXPOSING GERM-CELLS TO RAYS OF RADIUM in mind it seems almost self-evident that such a natural group of higher plants may not be artificially produced in the laboratory, nor, indeed, within the narrow confines of an experimental garden. But whether we may artificially produce a parent or ancestor of. Fig. 65. Onagra biennis. Permanently x\rrested Development. The Ovary, after Pollination, was exposed for 53 Hours to the Rays from Radium Bromide (10,000 X) Contained in a sealed Glass Tube. Cf. figure 66. a species is quite another question. A species has distinguishing marks because the individuals that compose it have those marks, and the group as a whole is separated from other groups of the same systematic rank for at least two reasons : (i) Because its individual members differ from the individual members of the other groups, and (2) because these distinguishing characters, within the range of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gager, C. Stuart (Charles Stuart), 1872-1943. New York
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