. Essentials of botany. Botany; Botany. Fig 162. Eockweed (Fucus) A, antheridia borne on branch- ing bairs (X160); B, three sperms from the same (X 330). surface for photosyn- thetic work. The outer layers of cells are espe- cially devoted to photosynthesis and the inner ones to storage of food material. The brown cell-contents contained in Fucus and other brown algse is highly efficient in photosynthesis. There is no asexual process of reproduc- tion in Fucus. Sexual reproduction is ac- complished by the eggs and sperms becoming forced out 1 These are absent in some species (Fig. 161).. Fig.

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. Essentials of botany. Botany; Botany. Fig 162. Eockweed (Fucus) A, antheridia borne on branch- ing bairs (X160); B, three sperms from the same (X 330). surface for photosyn- thetic work. The outer layers of cells are espe- cially devoted to photosynthesis and the inner ones to storage of food material. The brown cell-contents contained in Fucus and other brown algse is highly efficient in photosynthesis. There is no asexual process of reproduc- tion in Fucus. Sexual reproduction is ac- complished by the eggs and sperms becoming forced out 1 These are absent in some species (Fig. 161).. Fig. 163. Rockweed (Fucus). A, oogonium, its contents dividing into eight oospheres (X 160); B, an oosphere, escaped, surrounded by many sperms (X 160).. 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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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1908