The Origin of Species by Means of Natural Selection, Or, The Preservation of Favored Races in the Struggle for Life, Выпуск 5D. Appleton, 1896 |
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Стр. 3
... Gärtner , also , makes the rule equally universal ; and he disputes the entire fertility of Kölreuter's ten cases , But in these and in many other cases , Gärtner is obliged carefully to count the seeds , in order to show that there is ...
... Gärtner , also , makes the rule equally universal ; and he disputes the entire fertility of Kölreuter's ten cases , But in these and in many other cases , Gärtner is obliged carefully to count the seeds , in order to show that there is ...
Стр. 4
... Gärtner , arrived at diametrically opposite conclusions in regard to some of the very same forms . It is also most instructive to compare - but I have not space here to enter on details - the evidence advanced by our best botanists on ...
... Gärtner , arrived at diametrically opposite conclusions in regard to some of the very same forms . It is also most instructive to compare - but I have not space here to enter on details - the evidence advanced by our best botanists on ...
Стр. 5
... Gärtner , namely , that if even the less fertile hybrids be artificially fertilised with hybrid pollen of the same kind , their fertility , notwithstanding the frequent ill effects from manipulation , sometimes decidedly increases , and ...
... Gärtner , namely , that if even the less fertile hybrids be artificially fertilised with hybrid pollen of the same kind , their fertility , notwithstanding the frequent ill effects from manipulation , sometimes decidedly increases , and ...
Стр. 6
... Gärtner that some degree of sterility between distinct species is a universal law of nature . He experimented on some of the very same species as did Gärtner . The difference in their results may , I think , be in part accounted for by ...
... Gärtner that some degree of sterility between distinct species is a universal law of nature . He experimented on some of the very same species as did Gärtner . The difference in their results may , I think , be in part accounted for by ...
Стр. 8
... Gärtner believed to be the case , the fact would have been notorious to nursery- Horticulturists raise large beds of the same hybrid , and such alone are fairly treated , for by insect agency the several individuals are allowed to cross ...
... Gärtner believed to be the case , the fact would have been notorious to nursery- Horticulturists raise large beds of the same hybrid , and such alone are fairly treated , for by insect agency the several individuals are allowed to cross ...
Другие издания - Просмотреть все
The Origin of Species by Means of Natural Selection: Or, The ..., Том 2 Charles Darwin Полный просмотр - 1888 |
The Origin of Species by Means of Natural Selection, Or, The ..., Том 2 Charles Darwin Полный просмотр - 1896 |
The Origin of Species by Means of Natural Selection, Or, The ..., Том 2 Charles Darwin Полный просмотр - 1896 |
Часто встречающиеся слова и выражения
accumulated adapted admit affinity allied species ancient animals appear Archipelago arctic areas become beds believe birds breeds Cambrian changes characters classification climate closely allied continent crustaceans degree deposited difficulty distant distinct species domestic doubt embryo Europe existing extinct fact faunas fertilised fertility flowers formations formerly forms fossil fresh-water Fritz Müller Gärtner genera genus geological period geological record Glacial period groups of species habits hybrids hybrids produced important individuals inhabitants inherited insects instance intermediate intervals land larvæ less living mammæ mammals manner marine Marsupials migration modified descendants mongrels mountains natural selection naturalists nearly occur oceanic islands offspring organisation paleozoic parent parent-form peculiar perfect pistil plants pollen present probably produced quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs seeds Silurian South America species belonging stage stamens sterility structure successive suppose terrestrial tertiary tion variations varieties whilst widely different wings