Elementary Biology, Plant, Animal, HumanMacmillan, 1912 - 593 páginas |
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Página 41
... organs for holding the plant to the soil . Secure a vigorously growing plant in a pot ( e.g. a rubber plant ) or better try the following experiment on a good sized weed in a field . Attach to the stem just above ground level a spring ...
... organs for holding the plant to the soil . Secure a vigorously growing plant in a pot ( e.g. a rubber plant ) or better try the following experiment on a good sized weed in a field . Attach to the stem just above ground level a spring ...
Página 42
... organs for transmitting soil - water . Place some seedlings or weeds in red ink so that only the lower ends of the roots are in the liquid . Cut some cross sections of these roots above the point where they were in contact with the ink ...
... organs for transmitting soil - water . Place some seedlings or weeds in red ink so that only the lower ends of the roots are in the liquid . Cut some cross sections of these roots above the point where they were in contact with the ink ...
Página 43
... transmitting soil - water . A second function of roots we found to be that of absorbing soil - water and transmitting it to the stem . The — whole outer surface of young roots is covered with a. THE NUTRITIVE ORGANS OF PLANTS 43.
... transmitting soil - water . A second function of roots we found to be that of absorbing soil - water and transmitting it to the stem . The — whole outer surface of young roots is covered with a. THE NUTRITIVE ORGANS OF PLANTS 43.
Página 47
... into the rind ; is it hard or soft ? 4. Make a drawing ( X 2 ) showing both cross and longitudinal surfaces . Label rind , woody bundles , pith . 61. Experiments to show the upward path of sap through THE NUTRITIVE ORGANS OF PLANTS 47.
... into the rind ; is it hard or soft ? 4. Make a drawing ( X 2 ) showing both cross and longitudinal surfaces . Label rind , woody bundles , pith . 61. Experiments to show the upward path of sap through THE NUTRITIVE ORGANS OF PLANTS 47.
Página 48
... organs for support and leaf exposure . When we studied the manufacture of carbohydrates by plants , we proved that green leaves must be exposed to sunlight in order to carry on this important function . When the leaves receive the ...
... organs for support and leaf exposure . When we studied the manufacture of carbohydrates by plants , we proved that green leaves must be exposed to sunlight in order to carry on this important function . When the leaves receive the ...
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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 bacteria bark bean bees biology birds blood body boil bones bottle butterfly called carbon dioxid cavity cells chemical chemical elements chlorophyll color composed compound cotyledons covered crops cross-pollination Describe develop digestion disease dishes egg-cell embryo energy epidermis experiment Fehling's solution fertilized fish floral envelopes flowers food substances frog fruit functions gill glass grape sugar green growth human hydrogen inches insects intestine kinds known Label Laboratory Study larvæ layer leaf leaves legs lime water liquid living lungs material membrane microscope milk mineral matters moth mouth muscles nucleus nutrients Optional organs outer ovary ovule oxidation oxygen pansy paramecium petal piece pistil plants pollen grains preparation produced protein protoplasm root-hairs roots seedling seeds soil soil-water spores stamens starch stem stigma stoma stomata structure surface test tube thistle tube tiny tion tissue trees veins wall wings woody
Pasajes populares
Página 163 - 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 161 - 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 161 - 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 fibers the molecules are counting it, registering and storing it up to be used against him when the next temptation comes. Nothing we ever do is, in strict scientific literalness, wiped out. Of course, this has its good side as well as its bad one. As we become permanent drunkards by so many separate drinks, so we become saints in the moral, and authorities and experts...
Página 24 - 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 161 - 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 nerve cells and fibers the molecules are counting it, registering and storing it up to be used against him when the next temptation comes.
Página 91 - 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 163 - 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 162 - 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 76 - 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.
Página 161 - There is a story, which is credible enough, though it may not be true, of a practical joker, who, seeing a discharged veteran carrying home his dinner, suddenly called out, 'Attention!' whereupon the man instantly brought his hands down, and lost his mutton and potatoes in the gutter. The drill had been thorough, and its effects had become embodied in the man's nervous structure...