Botany Principles And Problems
Botany Principles And Problems
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In our eReader you can find the full English version of the book. Read Botany Principles And Problems 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 Botany Principles And Problems
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Thus in Indian corn the chromosome number is 20, in wheat 16, in peas 14, and in tobacco 48. Soon after the GROWTH 141 chromosomes become evident, two poles or apparent centers of attraction, arise in the cytoplasm on opposite sides of the nucleus, and from each of these poles a spindle of delicate fibers radiates inward toward the nucleus. The nuclear membrane now disappears and the chromosomes become grouped in a plane or plate stretching across the center of the cell at right angles to the t...wo series of spindle fibers, which soon meet and form on(» continuous spindle reaching from pole to pole. At this point each chromosome has become split lengthwise into two daughter chromosomes, one of which now moves toward one pole and the other toward the other pole. The whole chromatin mass is thus divided exactly into two and the halves separate widely. Each chromosome group now becomes broken up again into a network around which a new membrane forms, and two complete nuclei are thus produced.
What to read after Botany Principles And Problems?
You can find similar books in the "Read Also" column, or choose other free books by Edmund Ware Sinnott to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Thus in Indian corn the chromosome number is 20, in wheat 16, in peas 14, and in tobacco 48. Soon after the GROWTH 141 chromosomes become evident, two poles or apparent centers of attraction, arise in the cytoplasm on opposite sides of the nucleus, and from each of these poles a spindle of delicate fibers radiates inward toward the nucleus. The nuclear membrane now disappears and the chromosomes become grouped in a plane or plate stretching across the center of the cell at right angles to the t...wo series of spindle fibers, which soon meet and form on(» continuous spindle reaching from pole to pole. At this point each chromosome has become split lengthwise into two daughter chromosomes, one of which now moves toward one pole and the other toward the other pole. The whole chromatin mass is thus divided exactly into two and the halves separate widely. Each chromosome group now becomes broken up again into a network around which a new membrane forms, and two complete nuclei are thus produced.
What to read after Botany Principles And Problems?
You can find similar books in the "Read Also" column, or choose other free books by Edmund Ware Sinnott to read onlineMoreLess
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