On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeD. Appleton, 1909 - 430ÆäÀÌÁö |
µµ¼ º»¹®¿¡¼
71°³ÀÇ °á°ú Áß 1 - 5°³
9 ÆäÀÌÁö
... offspring not universal - Hybrids and mongrels compared independently of their fertility - Summary 219 CHAPTER IX ON THE IMPERFECTION OF THE GEOLOGICAL RECORD On the absence of intermediate varieties at the present day - On the nature ...
... offspring not universal - Hybrids and mongrels compared independently of their fertility - Summary 219 CHAPTER IX ON THE IMPERFECTION OF THE GEOLOGICAL RECORD On the absence of intermediate varieties at the present day - On the nature ...
20 ÆäÀÌÁö
... to fail in acting , we need not be surprised at this system , when it does act under confinement , acting not quite é© regularly , and producing offspring not perfectly like their parents 20 VARIATION UNDER DOMESTICATION.
... to fail in acting , we need not be surprised at this system , when it does act under confinement , acting not quite é© regularly , and producing offspring not perfectly like their parents 20 VARIATION UNDER DOMESTICATION.
21 ÆäÀÌÁö
... offspring not perfectly like their parents Sterility has been said to be the bane of horticulture ; but on this view we owe variability to the same cause which produces sterility ; and variability is the source of all the choicest ...
... offspring not perfectly like their parents Sterility has been said to be the bane of horticulture ; but on this view we owe variability to the same cause which produces sterility ; and variability is the source of all the choicest ...
24 ÆäÀÌÁö
... offspring at a corresponding age , though sometimes earlier . In many cases this could not be otherwise : thus the inherited peculiarities in the horns of cattle could appear only in the offspring when nearly mature ; peculiarities in ...
... offspring at a corresponding age , though sometimes earlier . In many cases this could not be otherwise : thus the inherited peculiarities in the horns of cattle could appear only in the offspring when nearly mature ; peculiarities in ...
27 ÆäÀÌÁö
... offspring of any single species , then such facts would have great weight in making us doubt about the immutability of the many very closely allied natural species — for instance , of the many foxes - inhabiting different quarters of ...
... offspring of any single species , then such facts would have great weight in making us doubt about the immutability of the many very closely allied natural species — for instance , of the many foxes - inhabiting different quarters of ...
±âŸ ÃâÆǺ» - ¸ðµÎ º¸±â
ÀÚÁÖ ³ª¿À´Â ´Ü¾î ¹× ±¸¹®
accumulated adapted affinities allied species America analogous ancient animals appear archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo endemic existing exterminated extinct extremely facts favourable fertilised fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids hybrids produced important increase individuals inhabitants inherited insects instance instincts intercrossing intermediate larv©¡ laws less living males mammals manner migration modification modified descendants natural selection naturalists nearly nest occasionally offspring organic organisation origin of species perfect pigeons plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rock-pigeon rudimentary seeds sexual sexual selection Silurian slight sometimes South America sterility structure struggle successive supposed swimbladder tend theory variability variations varieties vary whole widely