. Elements of botany. Botany; Botany. 226 ELEMENTS OP BOTANY. tained in the expanded portions, /. In these expansions there are produced somewhat spherical bodies, A, Pig. 197, which may be called egg-cells {pospheres), and ciliated fertil- izing cells, or antherozoids, G. After the bursting of thei thin membrane, shown at A, by which the egg-spheres are confined, they become covered with multitudes of the fertiliz- ing cells, as seen at F and H, and are often whirled about by the motion of the cilia of these cells. At length, the sub-. FiG. 197. — Production of Spores of Eookweed. (Much magni
. Elements of botany. Botany; Botany. 226 ELEMENTS OP BOTANY. tained in the expanded portions, /. In these expansions there are produced somewhat spherical bodies, A, Pig. 197, which may be called egg-cells {pospheres), and ciliated fertil- izing cells, or antherozoids, G. After the bursting of thei thin membrane, shown at A, by which the egg-spheres are confined, they become covered with multitudes of the fertiliz- ing cells, as seen at F and H, and are often whirled about by the motion of the cilia of these cells. At length, the sub-. FiG. 197. — Production of Spores of Eookweed. (Much magnified.) > A, a bundle of egg-spheres, or oospheres (from interior of/, Fig. 196); O, ciliated fertilizing cells, or antherozoids (from interior of /, Fig. 196); F, H, egg-spheres changing to spores by union of fertilizing cells with their contents. (G is magni- fied more than twice as much as the other parts of the figure.) stance of one of the ciliated cells becomes mingled with that of the naked protoplasmic egg-sphere, and the latter soon proceeds to develop a cell wall and begins at once to grow into a new plant of rockweed. THE STUDY OF YEAST. 276. Growth of Yeast in Dilute Syrup. — Mix about an eighth of a cake of compressed yeast with about a teaspoonful of water and stir until a smooth thin mixture is formed. Add this to about half a pint of water in which a tablespoonful of molasses has been dissolved. Place this mix- 1A and -F of this figure represent the spore-producing apparatus from Fucus platycarpus. Fig. 196 is FiKUs vesiculosus. The principle of spore-formation is very similar in the two 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 Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Ginn
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