Elementary Biology: Plant, Animal, HumanMacmillan Company, 1912 - 593 páginas |
Dentro del libro
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Página 2
... tree with that of an acorn from which it started , the amount of increase we find to be enor- mous . - Yet this is what hap- The average child , for pounds ; while a man's 3. Repair of Living Things . — In the second place , parts of a ...
... tree with that of an acorn from which it started , the amount of increase we find to be enor- mous . - Yet this is what hap- The average child , for pounds ; while a man's 3. Repair of Living Things . — In the second place , parts of a ...
Página 42
... roots for holding to the soil . One of the most obvious functions of roots is that of holding plants firmly in the ground . If the soil is carefully removed from the roots of a weed or a tree , these 42 PLANT BIOLOGY.
... roots for holding to the soil . One of the most obvious functions of roots is that of holding plants firmly in the ground . If the soil is carefully removed from the roots of a weed or a tree , these 42 PLANT BIOLOGY.
Página 43
... tree , these roots will be found to extend outward in all directions to a distance even greater than do the branches above ground . When one remembers the tremendous force exerted upon trees by high winds , the necessity for this ...
... tree , these roots will be found to extend outward in all directions to a distance even greater than do the branches above ground . When one remembers the tremendous force exerted upon trees by high winds , the necessity for this ...
Página 48
... trees , usually grow tall , thus lifting the leaves to the light . The amount of light exposure of trees and of most other plants is largely increased by branches and their subdividing twigs , to which the leaves are attached . In order ...
... trees , usually grow tall , thus lifting the leaves to the light . The amount of light exposure of trees and of most other plants is largely increased by branches and their subdividing twigs , to which the leaves are attached . In order ...
Página 50
... trees , the woody material through which sap passes is not ar- ranged in the form of annual rings , but the woody bundles are scattered through the pith . Each bundle consists of ducts that carry the soil - water up through the stem out ...
... trees , the woody material through which sap passes is not ar- ranged in the form of annual rings , but the woody bundles are scattered through the pith . Each bundle consists of ducts that carry the soil - water up through the stem out ...
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Elementary Biology, Plant, Animal, Human James Edward Peabody,Arthur Ellsworth Hunt Vista completa - 1912 |
Términos y frases comunes
abdomen adaptations alcohol animals arteries bacteria bees biology birds blood body bones bottle breathing butterfly called capillaries carbon dioxid cavity cells chlorophyll color composed compound corn cotyledons covered crayfish crops Describe develop digestion dishes egg-cell eggs embryo energy epidermis experiment Fehling's solution fertilized filaments fins fish floral envelopes flowers food substances frog fruit gill glass grain grape sugar growth head inches insects intestine jaws kinds known Label Laboratory Study larvæ layer leaf leaves legs lime water liquid living lungs malaria material membrane microscope mosquito moth mouth muscles nucleus nutrients Optional organs outer ovary ovule oxidation oxygen pairs paramecium piece pistil plants pollen produced protein protoplasm region roots salmon seedling seeds side soil sperm-cells spores stamens starch stem stoma stomach structure surface teeth test tube thistle tube tiny tion tissue trees veins wall wings
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...