Elementary Biology, Plant, Animal, HumanMacmillan, 1912 - 593 páginas |
Dentro del libro
Resultados 1-5 de 67
Página vii
... bacteria ; we may learn of the activities of individual men or of groups of individuals which promote or retard the advance of human society ; or we might , if we were to carry the study still farther , even seek to learn the ways by ...
... bacteria ; we may learn of the activities of individual men or of groups of individuals which promote or retard the advance of human society ; or we might , if we were to carry the study still farther , even seek to learn the ways by ...
Página xii
... bacteria ) , and that he should get as many of these facts as possible by observation . But to expect much laboratory work from young students on difficult microscopic forms like many of these cryptogams , is , we are confident , quite ...
... bacteria ) , and that he should get as many of these facts as possible by observation . But to expect much laboratory work from young students on difficult microscopic forms like many of these cryptogams , is , we are confident , quite ...
Página xix
... Bacteria III . Bacteria as the Friends of Man IV . Bacteria as the Foes of Man III . FOODS AND THEIR USES • I. Food Substances found in the Human Body II . The Necessity for Foods III . The Composition of Foods IV . Uses of the Food ...
... Bacteria III . Bacteria as the Friends of Man IV . Bacteria as the Foes of Man III . FOODS AND THEIR USES • I. Food Substances found in the Human Body II . The Necessity for Foods III . The Composition of Foods IV . Uses of the Food ...
Página 139
... bacteria , which are found all about us , in the soil , in the air we breathe , on the food we eat , and in the water we drink . Bacteria belong to a great group of plants called fungi . All fungi are characterized by the absence of ...
... bacteria , which are found all about us , in the soil , in the air we breathe , on the food we eat , and in the water we drink . Bacteria belong to a great group of plants called fungi . All fungi are characterized by the absence of ...
Página 140
... bacteria , for all decay is due to the work of these organisms . When we come to examine the flower - stems or the ... bacteria . A careful study of many kinds of bacteria shows that they have several characteristic shapes ( see Fig . 71 ) ...
... bacteria , for all decay is due to the work of these organisms . When we come to examine the flower - stems or the ... bacteria . A careful study of many kinds of bacteria shows that they have several characteristic shapes ( see Fig . 71 ) ...
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Elementary Biology: Plant, Animal, Human James Edward Peabody,Arthur Ellsworth Hunt Vista completa - 1912 |
Términos y frases comunes
alcohol animals anther arteries bacteria bark bean bees biology birds blood body bones bottle butterfly called carbon dioxid cavity cells chemical chemical elements chlorophyll color composed compound corn grain cotyledons covered crops cross-pollination Describe develop digestion egg-cell eggs embryo energy epidermis experiment Fehling's solution fertilized fish floral envelopes flowers food substances frog fruit functions germination gill glass grape sugar green growth hydrogen inches insects intestine kinds known Label Laboratory Study larvæ layer leaf leaves legs lime water liquid living lungs malaria material membrane microscope mineral matters mosquito moths mouth nucleus nutrients Optional organs outer ovary ovule oxidation oxygen pansy petal piece pistil plants pollen grains preparation produced protein protoplasm region root-hairs roots seedling seeds soil soil-water spores stamens starch stem stigma stoma stomach structure surface test tube thistle tube tiny tion trees tumbler veins wall wings
Pasajes populares
Página 169 - I suppose, have thus suffered; and if I had to live my life again, I would have made a rule to read some poetry and listen to some music at least once every week; for perhaps the parts of my brain now atrophied would thus have been kept active through use.
Página 167 - Could the young but realize how soon they will become mere walking bundles of habits, they would give more heed to their conduct while in the plastic state.
Página 36 - For they covered the face of the whole earth, so that the land was darkened; and they did eat every herb of the land, and all the fruit of the trees which the hail had left; and there remained not any green thing in the trees, or in the herbs of the field, through all the land of Egypt.
Página 167 - I won't count this time!" Well, he may not count it, and a kind Heaven may not count it; but it is being counted none the less. Down among his...
Página 168 - Let no youth have any anxiety about the upshot of his education, whatever the line of it may be. If he keep faithfully busy each hour of the working day, he may safely leave the final result to itself. He can with perfect certainty count on waking up some fine morning to find himself one of the competent ones of his generation, in whatever pursuit he may have singled out.
Página 103 - AMERICAN ORNITHOLOGISTS' UNION. An Act for the Protection of Birds and their Nests and Eggs. Section i. No person shall, within the State of- , kill or catch or have in his or her possession, living or dead, any wild bird other than a...
Página 169 - My mind seems to have become a kind of machine for grinding general laws out of large collections of facts ; but why this should have caused the atrophy of that part of the brain alone on which the higher tastes depend, I cannot conceive.
Página 167 - Well, he may not count it, and a kind Heaven may not count it; but it is being counted none the less. Down among his nerve-cells and fibres the molecules are counting it, registering and storing it up to be used against him when the next temptation comes.
Página 59 - In my opinion this exhibition of moral courage has never been surpassed in the annals of the Army of the United States.
Página 80 - The use of intoxicants by employes while on duty is prohibited. Their habitual use, or the frequenting of places where they are sold, is sufficient cause for dismissal.