A Textbook of Botany for Colleges, Μέρη 1-2Macmillan, 1920 - 604 σελίδες |
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Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
absorb Algæ animals antheridia anthers appear archegonia arrangement asexual Bacteria bark become blade bracts branches buds bundles called cambium carbon dioxide carpels chemical chiefly chlorenchyma chlorophyll chromosomes clusters color commonly containing dissemination diverse ducts egg cell elongated embryo sac epidermis epiphytes familiar Ferns fertilization fibro-vascular filament flowers foliage formation fruits function Fungi gardens geotropism germination grains grape sugar green grow growth higher plants important insects Kerner kinds layer leaf leaves light living method morphological Mosses mycelium nucleus occur organisms origin osmotic ovary ovules oxygen parasites petals petioles phloem photosynthesis physiological pistils pollen produce prominent proteins protoplasm reproduction respiration result roots seeds sepals sex cells sexual showing shrubs soil species sperm cells Spermatophytes sporangia spores sporophylls stalk stamens starch stems stomata structure substances surface tion tips tissues transpiration trees tropical tube typical usually vegetation walls whorls wind wood xylem
Δημοφιλή αποσπάσματα
Σελίδα v - A very good, up-to-date college text, "written in the knowledge that to nearly all college students an introductory course in Botany is part of a general education, and not a preparation for a professional botanical career ... In conformity with this aim, the book gives more attention to the large and visible aspects of plant nature than to the minute and obscure.
Σελίδα 21 - ... adapted to spread chlorenchyma to light. The formation of the sugar being thus a process of synthesis under action of light, is known as PHOTOSYNTHESIS. What now are the materials from which the grape sugar is constructed? The chemical formula of grape sugar is...
Σελίδα 271 - ... Redraw this figure on a sheet of paper and label the parts. Although pistils vary much in number of carpels, length of styles, and in number of locules and ovules, there is uniformity in organization and adaptation of parts to special functions. The stigma is especially adapted for receiving pollen, the style supports the stigma in a position suitable for receiving the pollen, and the ovary protects the delicate ovules in which is the embryo sac containing the egg and primary endosperm nucleus,...