Elementary Biology, Plant, Animal, HumanMacmillan, 1912 - 593 páginas |
Dentro del libro
Página 77
... fertilized egg - cell . The nucleus of this cell then divides and later the cell - body , thus forming two distinct ... fertilizing pollen . We may , therefore , give the following as a general definition of the process we are ...
... fertilized egg - cell . The nucleus of this cell then divides and later the cell - body , thus forming two distinct ... fertilizing pollen . We may , therefore , give the following as a general definition of the process we are ...
Página 78
... fertilized egy cell dividing into two cells FIG . 28. Diagram of a longitudinal section of a pistil showing ... fertilizing each egg - cell . Usually , however , far larger numbers of pollen grains be- come attached to the stigma ...
... fertilized egy cell dividing into two cells FIG . 28. Diagram of a longitudinal section of a pistil showing ... fertilizing each egg - cell . Usually , however , far larger numbers of pollen grains be- come attached to the stigma ...
Página 82
... fertilized 2.37 ; or as 100 to 42. In four of the five pots , a crossed plant flowered before any one of the self - fertilized ; as likewise occurred with the pair raised during the previous year . These plants without being disturbed ...
... fertilized 2.37 ; or as 100 to 42. In four of the five pots , a crossed plant flowered before any one of the self - fertilized ; as likewise occurred with the pair raised during the previous year . These plants without being disturbed ...
Página 83
... fertilized only 17 ; or as 100 to 10. So that the crossed plants were more than twice the height of the self - fertilized , generally flowered first , and produced ten times as many naturally fertilized capsules . " By the early part of ...
... fertilized only 17 ; or as 100 to 10. So that the crossed plants were more than twice the height of the self - fertilized , generally flowered first , and produced ten times as many naturally fertilized capsules . " By the early part of ...
Página 84
... fertilized plants . " The average height of the six tallest plants derived from the crossed plants is 12.56 inches ; and that of the six tallest plants derived from the self - fertilized plants is 10.31 inches ; or as 100 to 82. We ...
... fertilized plants . " The average height of the six tallest plants derived from the crossed plants is 12.56 inches ; and that of the six tallest plants derived from the self - fertilized plants is 10.31 inches ; or as 100 to 82. We ...
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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.