The Origin of Species by Means of Natural Selection: Or, the Preservation of Favored Races in the Struggle for Life, Volumen1D. Appleton, 1898 |
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... so admirably adapted to catch insects under the bark of trees . In the case of the mistletoe , which draws its nourishment from certain trees , which has seeds that must be transported by certain birds , and. INTRODUCTION . 3.
... so admirably adapted to catch insects under the bark of trees . In the case of the mistletoe , which draws its nourishment from certain trees , which has seeds that must be transported by certain birds , and. INTRODUCTION . 3.
Página 4
Or, the Preservation of Favored Races in the Struggle for Life Charles Darwin. seeds that must be transported by certain birds , and which has flowers with separate sexes absolutely re- quiring the agency of certain insects to bring ...
Or, the Preservation of Favored Races in the Struggle for Life Charles Darwin. seeds that must be transported by certain birds , and which has flowers with separate sexes absolutely re- quiring the agency of certain insects to bring ...
Página 9
... seed - capsule . At long intervals of time , out of millions of individuals reared in the same coun- try and fed on nearly the same food , deviations of structure so strongly pronounced as to deserve to be called monstrosities arise ...
... seed - capsule . At long intervals of time , out of millions of individuals reared in the same coun- try and fed on nearly the same food , deviations of structure so strongly pronounced as to deserve to be called monstrosities arise ...
Página 10
... seed ! In some few cases it has been discovered that a very trifling change , such as a little more or less water at some particular period of growth , will determine whether or not a plant will produce seeds . I cannot here give the ...
... seed ! In some few cases it has been discovered that a very trifling change , such as a little more or less water at some particular period of growth , will determine whether or not a plant will produce seeds . I cannot here give the ...
Página 12
... seed . They occur rarely under nature , but are far from rare under culture . As a single bud out of the many thousands , produced year after year on the same tree under uniform conditions , has been known suddenly to assume a new ...
... seed . They occur rarely under nature , but are far from rare under culture . As a single bud out of the many thousands , produced year after year on the same tree under uniform conditions , has been known suddenly to assume a new ...
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Términos y frases comunes
adapted advantage allied analogous animals and plants appear Asa Gray beak become bees believe birds breeds caudicle cause cells characters climate closely colour common crossed cuckoo degree descendants developed difficulty distinct species disuse divergence domestic animals domestic races doubt effects eggs existence extinct extremely facts favourable females flowers forms Fritz Müller genera genus giraffe gradations greater number groups habits Hence hermaphrodites hive-bee important increase inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less males manner Melipona Mivart modified natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species parent perfect period pigeons pollen pollen-grains present preserved prey principle probably produced progenitor quadrupeds rank rarely Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual selection slight stamens striped structure struggle supposed swimbladder tend tendency tion tree variability variations varieties vary widely wings young