Introduction to the Study of Biology
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In our eReader you can find the full English version of the book. Read Introduction to the Study of Biology 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 Introduction to the Study of Biology
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C, Flower of Valerian, cut vertically, a Ovary, containing the ovule or ovules ; b Style ; c Stigma ; d Stamen.
simplest and most fundamental form of a folded leaf or "ovary" (a), containing one or more germ-cells or ovules. The summit of the pistil is formed of loose cells, which are uncovered by epidermis, and secrete a viscid fluid, the whole constituting what is known as the " stigma " (c). The REPRODUCTION IN PLANTS. 123 stigma may be seated directly upon the ovary, or may be separated fro...m it by a longer or shorter stalk, which is termed the "style" (b).
The male and female organs of reproduction are usually present in the same flower, when the plant is " monoecious/' but at other times one individual produces the male flowers and another individual produces female flowers, when the species is " dioecious. " Even in bisexual flowers, however, there is reason to believe that there are natural arrange- ments whereby perpetual self-fertilisation is prevented, and the influence of another individual is at intervals secured.
What to read after Introduction to the Study of Biology?
You can find similar books in the "Read Also" column, or choose other free books by Nicholson Henry Alleyne to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
C, Flower of Valerian, cut vertically, a Ovary, containing the ovule or ovules ; b Style ; c Stigma ; d Stamen.
simplest and most fundamental form of a folded leaf or "ovary" (a), containing one or more germ-cells or ovules. The summit of the pistil is formed of loose cells, which are uncovered by epidermis, and secrete a viscid fluid, the whole constituting what is known as the " stigma " (c). The REPRODUCTION IN PLANTS. 123 stigma may be seated directly upon the ovary, or may be separated fro...m it by a longer or shorter stalk, which is termed the "style" (b).
The male and female organs of reproduction are usually present in the same flower, when the plant is " monoecious/' but at other times one individual produces the male flowers and another individual produces female flowers, when the species is " dioecious. " Even in bisexual flowers, however, there is reason to believe that there are natural arrange- ments whereby perpetual self-fertilisation is prevented, and the influence of another individual is at intervals secured.
What to read after Introduction to the Study of Biology?
You can find similar books in the "Read Also" column, or choose other free books by Nicholson Henry Alleyne to read onlineMoreLess
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