The book The Essentials of College Botany was written by author Charles E Charles Edwin Bessey Here you can read free online of The Essentials of College Botany book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Essentials of College Botany a good or bad book?
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505. By repeated subdivision and continued growth of the zygote a cylindrical stem is formed, rooted below, and with a whorl of narrow leaves above. This is the sporophyte (or "embryo" of the seed). It is nourished by the gametophyte tissue in which it is imbedded. In the meantime ovule, "seed scale, " and cone have increased in size, and later the "seed scales" lose their chlorophyll and become woody. Still later by the lessened supply of water all parts of the cone become dry, stopping the gr...owth of the young sporophyte. The cone- and seeds are now "ripe, " and by the spreading of the dry scales the part of the seed containing the embryo is split loose and blown away. Pinus (seeds, and young sporo- PINES 281 506. Germination of the seed takes place when water is again suppUecl, resulting in a resumption of the growth of the embryo, the bursting of the brittle integument (indusium) and the escape of nN\\|/A the root, stem and leaves of the embryo. C^^^f^ The root penetrates the soil and provides C^^\ \ i water, while the leaves (now green) pro- .
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