A student's text-book of botany Volume 1 - 7 Angebote vergleichen

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Von Händler/Antiquariat, amitcj.
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1895 Excerpt: ...has no chlorophyll. The male organ, or antheridium, is developed from the antheridial mother-cell mentioned above. It generally undergoes divisions so as to form a central cell surrounded by a single layer of cells forming the wall of the antheridium. But Salv inia is peculiar in that the central cell of each antheridium is not completely surrounded by a parietal layer of cells, but comes to the surface of the antheridium. The central cell then undergoes further divisions to form the mother-cells of the spermatozoids of which there are eight in the Salviniacece (four in each antheridium of Salvinia) and thirtytwo in the Marsileaceae. The male cells, or spermatozoids, resemble those of the homo-1 sporous leptosporangiate Ferns in all essential features of their form and development, as also in their extrusion from the antheridium. In the Marsileacoffi, the male prothallium is enclosed within the microspore until the antheridium is mature, when the spore-wnlls are ruptured by the swelling of the cells of the contained prothallium, and the spermatozoids are set free. The female individual is a small multicellular prothallium of a green colour, and is developed from a macrospore to which it remains attached. The development of the prothallium begins inside the macrospore at its pointed apical end, where there is an aggregation of protoplasm in which the nucleus lies. The nucleus divides, and this is followed by the formation of a cellwall between the two nuclei, cutting off the apical portion of the spore, as a small cell, from the basal larger portion; this first wall is termed the diaphragm, and it marks off that portion of the macrospore which gives rise to the prothallium from that portion which takes no part in the process. The small cell then undergoes re... Paperback, Label: RareBooksClub.com, RareBooksClub.com, Product group: Book, Published: 2012-03-06, Studio: RareBooksClub.com.

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Von Händler/Antiquariat, super_star_seller.
This scarce antiquarian book is a facsimile reprint of the original. Due to its age, it may contain imperfections such as marks, notations, marginalia and flawed pages. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions that are true to the original work. Hardcover, Label: Kessinger Publishing, LLC, Kessinger Publishing, LLC, Product group: Book, Published: 2010-05-23, Studio: Kessinger Publishing, LLC.

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Von Händler/Antiquariat, myrockland.
This scarce antiquarian book is a facsimile reprint of the original. Due to its age, it may contain imperfections such as marks, notations, marginalia and flawed pages. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions that are true to the original work. Hardcover, Label: Kessinger Publishing, LLC, Kessinger Publishing, LLC, Product group: Book, Published: 2010-05-23, Studio: Kessinger Publishing, LLC.

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Von Händler/Antiquariat, Ergodebooks.
RareBooksClub.com, 2012-03-06. Paperback. Used:Good. Ships Fast. 24*7 Customer Service.

Von Händler/Antiquariat, Ergodebooks [8304062], RICHMOND, TX, U.S.A.
This item is printed on demand.

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Von Händler/Antiquariat, Through The Stacks LLC, NY, Brockport, [RE:3].
NEW ITEM. SHIPS WITH DELIVERY CONFIRMATION WORLDWIDE. Hard cover.

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Von Händler/Antiquariat, ExtremelyReliable, TX, Richmond, [RE:3].
Paperback.