The Origin of Species by Means of Natural Selection: Or, the Preservation of Favored Races in the Struggle for Life, Том 1D. Appleton, 1898 |
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Стр. 56
... hermaphrodite plant should produce from the same seed - capsule three distinct hermaphrodite forms , bear- ing three different kinds of females and three or even six different kinds of males . Nevertheless these cases are only ...
... hermaphrodite plant should produce from the same seed - capsule three distinct hermaphrodite forms , bear- ing three different kinds of females and three or even six different kinds of males . Nevertheless these cases are only ...
Стр. 118
... two individuals must always ( with the exception of the curious and not well understood cases of parthenogenesis ) unite for each birth ; but in the case of hermaphrodites this is far from obvious . 118 [ CHAP . IV . ON THE INTERCROSSING.
... two individuals must always ( with the exception of the curious and not well understood cases of parthenogenesis ) unite for each birth ; but in the case of hermaphrodites this is far from obvious . 118 [ CHAP . IV . ON THE INTERCROSSING.
Стр. 119
... hermaphrodites , and of real hermaphro- dites a large number pair ; that is , two individuals regu- larly unite for reproduction , which is all that concerns us . But still there are many hermaphrodite animals which certainly do not ...
... hermaphrodites , and of real hermaphro- dites a large number pair ; that is , two individuals regu- larly unite for reproduction , which is all that concerns us . But still there are many hermaphrodite animals which certainly do not ...
Стр. 123
... hermaphrodites , such as the land - mol- lusca and earth - worms ; but these all pair . As yet I have not found a single terrestrial animal which can fertilise itself . This remarkable fact , which offers so strong a contrast with ...
... hermaphrodites , such as the land - mol- lusca and earth - worms ; but these all pair . As yet I have not found a single terrestrial animal which can fertilise itself . This remarkable fact , which offers so strong a contrast with ...
Стр. 124
... hermaphrodites , and some unisexual . But if , in fact , all hermaphrodites do occasionally inter- cross , the difference between them and unisexual species is , as far as function is concerned , very small . From these several ...
... hermaphrodites , and some unisexual . But if , in fact , all hermaphrodites do occasionally inter- cross , the difference between them and unisexual species is , as far as function is concerned , very small . From these several ...
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The Origin of Species by Means of Natural Selection: Or, The ..., Том 1 Charles Darwin Полный просмотр - 1889 |
Часто встречающиеся слова и выражения
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