. An introduction to vegetable physiology. Plant physiology. Fig. 180.—Antherozo'ids of Moss (a) and Feen (b). above the Thallophytes. The mode of bringing the gametes together varies with the habit of life of the plant. Where the male gamete is a motile antherozo'id it makes its way to the oosphere by means of its cilia, which enable it to swim freely in water. In those forms with a terrestrial habit, such as the Bryophyta and Pteridophyta, in which the antherozoid is ciliated (fig. 180), fertilisation can only be. Fig. 181.—Development op the Anthebidium in the Febn. (After Kny.) brought abo
. An introduction to vegetable physiology. Plant physiology. Fig. 180.—Antherozo'ids of Moss (a) and Feen (b). above the Thallophytes. The mode of bringing the gametes together varies with the habit of life of the plant. Where the male gamete is a motile antherozo'id it makes its way to the oosphere by means of its cilia, which enable it to swim freely in water. In those forms with a terrestrial habit, such as the Bryophyta and Pteridophyta, in which the antherozoid is ciliated (fig. 180), fertilisation can only be. Fig. 181.—Development op the Anthebidium in the Febn. (After Kny.) brought about when the gametophytes are moistened, as is the case from time to time. The antherozo'ids sometimes arise in antheridia upon the same gametophyte as the arche- gonia with their oospheres, sometimes upon different ones. In the heterosporous forms of course the latter is always the case. A large number of such gametophytes, bearing male and female cells respectively, are always produced in. 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 Green, J. Reynolds (Joseph Reynolds), 1848-1914. Philadelphia, P. Blakiston
Size: 2388px × 1047px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1900, bookdecade1900, booksubjectplantphysiology
