Plant Life and Plant Uses: An Elementary Textbook, a Foundation for the Study of Agriculture, Domestic Science Or College BotanyAmerican book Company, 1913 - 464 pages |
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Common terms and phrases
abundant advantage algæ angiosperms animals antheridia anthers appears archegonia arrangement axils bacteria body branches buds called cambium carpels cells chlorophyll chloroplasts close-pollination common composed corn corolla cortex cotyledons crops Define Describe diclinous embryo endosperm epidermis evaporation evident Explain fact ferns fertilization Figure filament flowers forests fruits function fungi gametophyte germination Give examples grains green plants grow growth gymnosperms habit important inflorescences insects layer leaf learned leaves light liverworts living things means megasporangia megaspores mesophyll molecules mosses nitrogen noted nutrition occurs organs osmosis ovary ovule oxygen petals petiole phloëm photosynthesis pistillate pollen tube principal produce protoplasm reproduction rhizome root-hairs roots SECTION seed plants showing soil solutes sperms spores sporogonium sporophyte stamens starch stele stems stigma stomates structure substances sugar surface tion tissue transpiration trees true fungi understand usually vascular bundles veins walls wheat wood xylem young
Popular passages
Page 32 - I should, in the first place, secure that training of the young in reading and writing, and in the habit of attention and observation, both to that which is told them, and that which they see, which everybody agrees to. But, in addition to that, I should make it absolutely necessary for everybody, for a longer or shorter period, to learn to draw. Now, you may say, there are some people who cannot draw, however much they may be taught. I deny that in toto, because I never yet met with anybody who...
Page 32 - I do not think its value can be exaggerated, because it gives you the means of training the young in attention and accuracy, which are the two things in which all mankind are more deficient than in any other mental quality whatever.
Page 96 - And each molecule is composed of two atoms of Hydrogen and one atom of Oxygen — the combination always being the same in every molecule of water.
Page vii - The pupil must know from the beginning what is aimed at if he is to employ his whole strength in the effort of learning ; and he will employ it provided he knows definitely what is to be reached.
Page vi - ... life and about the relation between plants and man. It aims to present only those large facts about plants which form the present basis of the science of botany, and which are essential to every high school botanist. In so far as is possible, plant life is presented in terms of its largest relation to life, but the treatment has in view preparation for life in general, and not preparation for any particular kind of calling. The subject...
Page v - Yet the treatment has in view preparation for life in general, and not preparation for any particular kind of calling. The subject is dealt with from the viewpoint of the pupil rather than from that of the teacher or the scientist.
Page 222 - ... has filled the air with moisture, results in the leaf injury known as scalding. Under these conditions, transpiration is checked and the temperature of the leaf becomes too high. As a large part of the sunlight is changed into heat by the leaf, the heat accumulates very rapidly in bright sunshine. It has been found in the case of some leaves that the excess of heat, if transpiration be stopped, may raise the internal temperature of the leaf to the death point in a few minutes. Transpiration,...
Page 220 - With these facts in mind it is not difficult to understand the irregular banding in deposits of alternating fine sand and silt, and sand and gravel.
Page 294 - Thus you see that it is impossible to artange flowers in a series from the most primitive up to the most advanced. Evolution has evidently proceeded by many branching roads rather than along one main highway. Also it is not necessarily true that the simplest flowers are the most primitive or that the most complex are the most advanced, for evolution may result in an increase of simplicity as well as in an increase of complexity.
Page 177 - In living trees there grows each year a ring of wood between the old wood and the bark, and by counting the rings you can tell the age of the tree.