A Textbook of Botany for Colleges, Μέρη 1-2MacMillan Company, 1921 - 401 σελίδες |
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Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
absorb Alga Algæ animals antheridia appear archegonia asexual Bacteria bark become bracts branches Bryophytes buds bundles called cambium carbon dioxide carpels chemical chiefly chlorenchyma chlorophyll chromosomes clusters color containing dissemination diverse ducts egg cell elongated embryo sac epidermis epiphytes familiar Ferns fertilization fibro-vascular filament flowers foliage formation fruits function Fungi geotropism germinate grains grape sugar green grow growth HABITATS herbs higher plants insects Kerner kinds known leaf leaves light living method morphological Mosses mycelium occur organs osmotic ovary ovules oxygen parasites petals petioles phloem photosynthesis pistils pollen produce prominent prothallus protoplasm Pteridophytes reproduction respiration roots saprophytes seeds sepals sexual showing shrubs soil species sperm cells Spermatophytes sporangia spores sporophyte stalk stamens starch stems stomata structure substances surface thallus tion tips tissues transpiration trees tropical tube typical typified usually vegetation forms walls wind wood xerophytic xylem
Δημοφιλή αποσπάσματα
Σελίδα 22 - The average person knows that atmospheric air contains about 21 per cent, of oxygen and 79 per cent, of nitrogen (with other inert gases), mixed with a trace of carbon dioxide and varying amounts of water-vapour.
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 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.