On the Origin of Species by Means of Natural Selection |
From inside the book
Results 1-5 of 73
Page 7
... period co - extensive with the world , • 302 CHAPTER XII . GEOGRAPHICAL DISTRIBUTION - Continued . Distribution of fresh - water productions - On the inhabitants of oceanic islands - Ab- sence of Batrachians and of terrestrial mammals ...
... period co - extensive with the world , • 302 CHAPTER XII . GEOGRAPHICAL DISTRIBUTION - Continued . Distribution of fresh - water productions - On the inhabitants of oceanic islands - Ab- sence of Batrachians and of terrestrial mammals ...
Page 14
... such as wheat , still often yield new varieties : our oldest domesticated animals are still capable of rapid improvement or modification . It has been disputed at what period of life , 14 СНАР . І VARIATION UNDER DOMESTICATION .
... such as wheat , still often yield new varieties : our oldest domesticated animals are still capable of rapid improvement or modification . It has been disputed at what period of life , 14 СНАР . І VARIATION UNDER DOMESTICATION .
Page 15
Charles Darwin. It has been disputed at what period of life , the causes of variability , whatever they may be , generally act ; whether during the early or late period of development of the embryo , or at the instant of conception ...
Charles Darwin. It has been disputed at what period of life , the causes of variability , whatever they may be , generally act ; whether during the early or late period of development of the embryo , or at the instant of conception ...
Page 20
... period at which it first appeared in the parent . I believe this rule to be of the highest importance in explaining the laws of embryology . These remarks are of course confined to the first appearance of the peculiarity , and not to ...
... period at which it first appeared in the parent . I believe this rule to be of the highest importance in explaining the laws of embryology . These remarks are of course confined to the first appearance of the peculiarity , and not to ...
Page 37
... periods of English history choice animals were often imported , and laws were passed to prevent their exportation ... period at- tended to . Savages now sometimes cross their dogs with wild canine animals , to improve the breed , and ...
... periods of English history choice animals were often imported , and laws were passed to prevent their exportation ... period at- tended to . Savages now sometimes cross their dogs with wild canine animals , to improve the breed , and ...
Other editions - View all
Common terms and phrases
accumulated adapted affinities allied species America amount ancient animals appear 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 Europe existing exterminated extinct extremely facts favourable fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ laws less living look male mammals manner migration modification modified descendants natural selection naturalists nearly nest offspring organic organisation perfect pigeons pistil plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rudimentary seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder tend theory tion trees variability variation varieties vary whole widely