. Botany; principles and problems. Botany. Fig. 151.—Vaucheria. Asexual reproduction. The tip of a filament is cut off by a wall and its contents becomes a large zoospore, with many nuclei and many groups of paired cilia. The zoospore breaks through the wall and escapes. {After Gotz.) ing, tubular filaments. Large zoospores are produced, each of which is merely the contents of the tip of a filament which has been cut off by a wall and has escaped (Fig. 151). The sexual organs are not simply modified vegetative cells, as in the plants. Fig. 152.—Vaucheria. Sexual reproduction. Oogonia, o, each
. Botany; principles and problems. Botany. Fig. 151.—Vaucheria. Asexual reproduction. The tip of a filament is cut off by a wall and its contents becomes a large zoospore, with many nuclei and many groups of paired cilia. The zoospore breaks through the wall and escapes. {After Gotz.) ing, tubular filaments. Large zoospores are produced, each of which is merely the contents of the tip of a filament which has been cut off by a wall and has escaped (Fig. 151). The sexual organs are not simply modified vegetative cells, as in the plants. Fig. 152.—Vaucheria. Sexual reproduction. Oogonia, o, each contain a single egg. Antheridia, a, have discharged all their sperms and are empty. A, V. terrestris. B, V. sessilis X 130. previously studied, but arc specialized for gamete production (Fig. 152). A cell partitioned off by a wall from the main fila- ment or from a small lateral branch becomes the oogonium, within which a single, large egg is formed. From the tip of another. 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 Sinnott, Edmund Ware, 1888-. New York, McGraw-Hill
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbotany, bookyear1923
