Mutations And Evolution
Mutations And Evolution
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In our eReader you can find the full English version of the book. Read Mutations And Evolution 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 Mutations And Evolution
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What determines the number of generations required is quite unknown at the present time, nor is the modus operandi understood. But we may assume that in the process, altered metabolic products in the cytoplasm ultimately produce a modification of a chromatin element which is permanent in character. It may be expected that such a transformation will occur much more rapidly in some cases than others.
102 Mutations and Evolution.
The views here set forth regarding the occurrence of both mutational... and adaptational characters in organisms are entirely in harmony with Dendy's (1913, 1916) conclusions from investigations of the sponges. He concludes that the specific characters of sponges are generally non-adaptive, and that a great many of the spicule differences so characteristic of the group must have originated by mutations. He also points out what we would now regard as parallel mutations, as in the appearance of trichodragmata, and in the polyphyletic family Epipolasidae, which is an assemblage of stelletid sponges which have independently lost their triaeue spicules.
What to read after Mutations And Evolution?
You can find similar books in the "Read Also" column, or choose other free books by R R Reginald Ruggles Gates to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
What determines the number of generations required is quite unknown at the present time, nor is the modus operandi understood. But we may assume that in the process, altered metabolic products in the cytoplasm ultimately produce a modification of a chromatin element which is permanent in character. It may be expected that such a transformation will occur much more rapidly in some cases than others.
102 Mutations and Evolution.
The views here set forth regarding the occurrence of both mutational... and adaptational characters in organisms are entirely in harmony with Dendy's (1913, 1916) conclusions from investigations of the sponges. He concludes that the specific characters of sponges are generally non-adaptive, and that a great many of the spicule differences so characteristic of the group must have originated by mutations. He also points out what we would now regard as parallel mutations, as in the appearance of trichodragmata, and in the polyphyletic family Epipolasidae, which is an assemblage of stelletid sponges which have independently lost their triaeue spicules.
What to read after Mutations And Evolution?
You can find similar books in the "Read Also" column, or choose other free books by R R Reginald Ruggles Gates to read onlineMoreLess
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