The Origin of Species by Means of Natural Selection: Or, the Preservation of Favored Races in the Struggle for Life, 1권D. Appleton, 1898 |
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xi 페이지
... birds . On the wide geographical range of a species of Galaxias , a fresh - water fish . Discussion on analogical resemblances , enlarged and modified . Homological structure of the feet of certain mar- supial animals . On serial ...
... birds . On the wide geographical range of a species of Galaxias , a fresh - water fish . Discussion on analogical resemblances , enlarged and modified . Homological structure of the feet of certain mar- supial animals . On serial ...
xx 페이지
... bird in and for such islands , he chiefly expresses that he knows not how the Red Grouse came to be there , and there exclusively ; signifying also , by this mode of expressing such ignorance , his belief that both the bird and the ...
... bird in and for such islands , he chiefly expresses that he knows not how the Red Grouse came to be there , and there exclusively ; signifying also , by this mode of expressing such ignorance , his belief that both the bird and the ...
3 페이지
... and tongue , 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.
... and tongue , 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.
4 페이지
... birds , and which has flowers with separate sexes absolutely re- quiring the agency of certain insects to bring pollen from one flower to the other , it is equally preposterous to account for the structure of this parasite , with its ...
... birds , and which has flowers with separate sexes absolutely re- quiring the agency of certain insects to bring pollen from one flower to the other , it is equally preposterous to account for the structure of this parasite , with its ...
11 페이지
... birds , with the rarest ex- ceptions , hardly ever lay fertile eggs . Many exotic plants have pollen utterly worthless , in the same con- dition as in the most sterile hybrids . When , on the one hand , we see domesticated animals and ...
... birds , with the rarest ex- ceptions , hardly ever lay fertile eggs . Many exotic plants have pollen utterly worthless , in the same con- dition as in the most sterile hybrids . When , on the one hand , we see domesticated animals and ...
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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