Journal of Applied Microscopy 2
Journal of Applied Microscopy 2
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In our eReader you can find the full English version of the book. Read Journal of Applied Microscopy 2 Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Journal of Applied Microscopy 2
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The present writer confirms the results mentioned under 4, 5, and 6, but believes that the statements given under 1, 2, and 3 are largely erroneous.
He does not believe that Davis is right in regarding the trichogyne as an inde- pendent cell. The spermatia, when in contact with the trichogyne or near the trichogyne, are provided i^ith a membrane and almost always have two nuclei.
One of these nuclei, surrounded by its protoplasm, wanders into the trichogyne, and the other usually follows, the n...arrowness of the canal apparently offering no hindrance to the passage of the nucleus from the spermatium to the trichogjme, A series of stages shows that there is a union of the sperm-nucleus with the nucleus of the carpogonium, as would be expected from Willes' work on Nemalion tnultifi- dumy and Ottmann's researches on various members of the Rhodophyceae.
The plates will hardly bear comparison with Davis* excellent drawings of Batrachospermum, but the evidence against points 1, 2, and 3, as stated above, together with positive evidence that there is a fusion between the nucleus of the spermatium and that of the carpogonium, makes it almost certain that Batrachospermum is not so exceptional in its fertilization as has been thought.
What to read after Journal of Applied Microscopy 2?
You can find similar books in the "Read Also" column, or choose other free books by Bausch Lomb Optical Company to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The present writer confirms the results mentioned under 4, 5, and 6, but believes that the statements given under 1, 2, and 3 are largely erroneous.
He does not believe that Davis is right in regarding the trichogyne as an inde- pendent cell. The spermatia, when in contact with the trichogyne or near the trichogyne, are provided i^ith a membrane and almost always have two nuclei.
One of these nuclei, surrounded by its protoplasm, wanders into the trichogyne, and the other usually follows, the n...arrowness of the canal apparently offering no hindrance to the passage of the nucleus from the spermatium to the trichogjme, A series of stages shows that there is a union of the sperm-nucleus with the nucleus of the carpogonium, as would be expected from Willes' work on Nemalion tnultifi- dumy and Ottmann's researches on various members of the Rhodophyceae.
The plates will hardly bear comparison with Davis* excellent drawings of Batrachospermum, but the evidence against points 1, 2, and 3, as stated above, together with positive evidence that there is a fusion between the nucleus of the spermatium and that of the carpogonium, makes it almost certain that Batrachospermum is not so exceptional in its fertilization as has been thought.
What to read after Journal of Applied Microscopy 2?
You can find similar books in the "Read Also" column, or choose other free books by Bausch Lomb Optical Company to read onlineMoreLess
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