Essays Upon Heredity And Kindred Biological Problems;
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I have elsewhere endeavoured to render the duration of life in the animal kingdom intelligible by the appli- cation of this principle, and have attempted to show that its varying duration is determined in different species by the varying number of somatic cell-generations ^. Of course, the varying duration of each cell-generation materially influences the total length of life, and experience teaches us that the dura- tion of cell-generations varies, not only in the lowest Metazoa as compared wi...th the highest, but even in the various kinds of cells in one and the same species of animal.
We must, for the present, leave unanswered the question — upon what changes in the physical constitution of protoplasm does the variation in the capacity for cell-duration depend ; and what are the causes which determine the greater or smaller number of cell-generations. I mention this obvious difficulty because it is the custom to meet every attempt to search deeper into the common phenomena of life with the reproach that so much is still lefl unexplained.
What to read after Essays Upon Heredity And Kindred Biological Problems;?
You can find similar books in the "Read Also" column, or choose other free books by Weismann, August, 1834-1914 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
I have elsewhere endeavoured to render the duration of life in the animal kingdom intelligible by the appli- cation of this principle, and have attempted to show that its varying duration is determined in different species by the varying number of somatic cell-generations ^. Of course, the varying duration of each cell-generation materially influences the total length of life, and experience teaches us that the dura- tion of cell-generations varies, not only in the lowest Metazoa as compared wi...th the highest, but even in the various kinds of cells in one and the same species of animal.
We must, for the present, leave unanswered the question — upon what changes in the physical constitution of protoplasm does the variation in the capacity for cell-duration depend ; and what are the causes which determine the greater or smaller number of cell-generations. I mention this obvious difficulty because it is the custom to meet every attempt to search deeper into the common phenomena of life with the reproach that so much is still lefl unexplained.
What to read after Essays Upon Heredity And Kindred Biological Problems;?
You can find similar books in the "Read Also" column, or choose other free books by Weismann, August, 1834-1914 to read onlineMoreLess
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