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Botany |
Record 51 to 75 of 142 |
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Linnaeus' Class 2 The sexual system of a plant, here having two stamens, Diandria.... |
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Linnaeus' Class 3 The sexual system of a plant, here having three stamens, Triandria.... |
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Linnaeus' Class 4 The sexual system of a plant, here having four stamens, Tetrandria.... |
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Liverwort Life Cycle "Life-history of Liverwort (Marchantia polymorpha): 1 and 2, developing thallus; 2 shows the cup with gemmae; 3, section across thallus, showing chimney-shaped stoma and green cells under, and mucilag... |
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Megaspore Formation Stage 1 "Stages in the formation of the megaspore, its germination, fertilization of the egg and endosperm cells. A, beginning of ovule at o." -Stevens, 1916... |
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Megaspore Formation Stage 10 "Stages in the formation of the megaspore, its germination, fertilization of the egg and endosperm cells. J, continued nuclear division has resulted in eight, namely, three antipodal nuclei, an, at th... |
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Megaspore Formation Stage 11 "Stages in the formation of the megaspore, its germination, fertilization of the egg and endosperm cells. K, showing only the lower half of the megaspore or embryo-sac cavity, with pollen tube, pt, an... |
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Megaspore Formation Stage 12 "Stages in the formation of the megaspore, its germination, fertilization of the egg and endosperm cells. L, later stage in the embryo-sac, an, antipodal cells, em, beginning of the embryo by division... |
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Megaspore Formation Stage 2 "Stages in the formation of the megaspore, its germination, fertilization of the egg and endosperm cells. B, nu, nucellus" -Stevens, 1916... |
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Megaspore Formation Stage 3 "Stages in the formation of the megaspore, its germination, fertilization of the egg and endosperm cells. Ca, nu, nucellus, a, archesporium; in, forward growth of tissue to form the integument; Cb, nu... |
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Megaspore Formation Stage 4 "Stages in the formation of the megaspore, its germination, fertilization of the egg and endosperm cells. D, more highly magnified drawing of o in A showing archesporial cell at a." -Stevens, 1916... |
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Megaspore Formation Stage 5 "Stages in the formation of the megaspore, its germination, fertilization of the egg and endosperm cells. E, a, archesporial cell enlarged and ready for division; nu, tissue of the nucellus." -Stevens... |
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Megaspore Formation Stage 6 "Stages in the formation of the megaspore, its germination, fertilization of the egg and endosperm cells. F, a, archesporial cell dividing, nu, nucellus." -Stevens, 1916... |
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Megaspore Formation Stage 7 "Stages in the formation of the megaspore, its germination, fertilization of the egg and endosperm cells. G, row of four megaspores descended from the archesporial cell, only the upper one, m, functio... |
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Megaspore Formation Stage 8 "Stages in the formation of the megaspore, its germination, fertilization of the egg and endosperm cells. H, megaspore, m, enlarging, the others disappearing." -Stevens, 1916... |
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Megaspore Formation Stage 9 "Stages in the formation of the megaspore, its germination, fertilization of the egg and endosperm cells. I, nucleus of the megaspore, divided into two, md." -Stevens, 1916... |
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Microspore Archesporium The archesporium in the stages of "formation of anthers and pollen grains or microspores of Silphium." -Stevens, 1916... |
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Microspore Cells The primary sporogenous cell (ps) and the primary parietal layer (ppr) in the stages of "formation of anthers and pollen grains or microspores of Silphium." -Stevens, 1916... |
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Microspore Cells The sporogenous cells (s), tapetum (t), two parietal layers (oo) in the stages of "formation of anthers and pollen grains or microspores of Silphium." -Stevens, 1916... |
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Microspore Cells The sporogenous cells (s), tapetum (t), two parietal layers (oo) in the stages of "formation of anthers and pollen grains or microspores of Silphium." -Stevens, 1916... |
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Microspore Layers The inner layer (i), outer layer (o), sporogenous cells (s) in the stages of "formation of anthers and pollen grains or microspores of Silphium." -Stevens, 1916... |
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Osmosis "Egg on beaker of water, to show osmosis." -Bergen, 1896... |
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Palisade Cell "Diagrammatic representation of a single palisade cell, with chloroplasts lining the walls." -Stevens, 1916... |
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Palisade Cell "Diagram to show the activities going on in a palisade cell. The arrows from the chloroplasts into the cell cavity indicate movement of photosynthesized product. The thickness of the arrow shafts unde... |
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Palisade Cell Intake "Diagram to show the intake of carbon dioxide by the palisade cells from the intercellular spaces, the absorption by the chloroplasts of water from the cell-sap, and the passage of food from the chlor... |
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