The Origin of Species by Means of Natural Selection; Or, the Preservation of Favored Races in the Struggle for Life ... |
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In several cases, however, insects found living on different plants, have been
observed by Mr. Walsh to present in their larval or mature state, or in both states,
slight, though constant differences in color, size, or in the nature of their
secretions.
In several cases, however, insects found living on different plants, have been
observed by Mr. Walsh to present in their larval or mature state, or in both states,
slight, though constant differences in color, size, or in the nature of their
secretions.
129 페이지
Kirby has remarked (and I have observed the same fact) that the anterior tarsi, or
feet, of many male dung-feeding beetles are often broken off; he examined
seventeen specimens in his own collection, and not one had even a relic left.
Kirby has remarked (and I have observed the same fact) that the anterior tarsi, or
feet, of many male dung-feeding beetles are often broken off; he examined
seventeen specimens in his own collection, and not one had even a relic left.
221 페이지
But he might have found an answer to this objection in the excellent observations
published in 1867 by Malm. The Pleuronectidae, while very young and still
symmetrical, with their eyes standing on opposite sides of the head, cannot long
...
But he might have found an answer to this objection in the excellent observations
published in 1867 by Malm. The Pleuronectidae, while very young and still
symmetrical, with their eyes standing on opposite sides of the head, cannot long
...
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according action adapted admit advantage allied America amount animals appear become believe belonging birds breeds called cause certain characters climate closely color common considered continued crossed descended developed difficulty distinct domestic doubt effects existing extinct extremely facts favorable fertility flowers follow formation forms genera genus give given groups habits hand Hence hybrids important increase individuals inhabitants inherited insects instance instincts intermediate islands kind known land laws less living look male manner means modified namely natural selection naturalists nearly observed occur organs origin parent perfect period plants points present principle probably produced range ranked reason remarked resemblance respect seeds seems seen separated shown side similar single slight sometimes species stage sterility structure successive suppose tend theory tion variability variations varieties various vary whole widely young
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| 제목 | The Origin of Species by Means of Natural Selection; Or, the Preservation of Favored Races in the Struggle for Life ... Burt's Home Library Burt's library of the worlds best books Century series Home Library, New Pocket Editions of Standard Classics Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925 Roxburghe classics The home library World's famous literature |
| 저자 | Charles Darwin |
| 에디션 | 재판 |
| 발행인 | A.L. Burt, 1890 |
| 소장 | 일리노이 대학 - 어바나-샴페인 |
| 디지털화된 날짜: | 2017년 8월 15일 |
| 길이 | 538페이지 |
| 서지정보 내보내기 | BiBTeX EndNote RefMan |