The Origin of Species by Means of Natural Selection: Or, the Preservation of Favored Races in the Struggle for Life, Volumen1D. Appleton, 1898 |
Dentro del libro
Resultados 1-5 de 83
Página v
... VARIATION UNDER DOMESTICATION . Causes of Variability - Effects of Habit and the use or disuse of Parts - Correlated Variation - Inheritance - Character of . Do- mestic Varieties - Difficulty of distinguishing between Varieties and ...
... VARIATION UNDER DOMESTICATION . Causes of Variability - Effects of Habit and the use or disuse of Parts - Correlated Variation - Inheritance - Character of . Do- mestic Varieties - Difficulty of distinguishing between Varieties and ...
Página vi
... VARIATION . . 97 Effects of changed conditions - Use and disuse , combined with natural selection ; organs of flight and of vision - Acclimatisa- tion - Correlated variation - Compensation and economy of growth. vi CONTENTS .
... VARIATION . . 97 Effects of changed conditions - Use and disuse , combined with natural selection ; organs of flight and of vision - Acclimatisa- tion - Correlated variation - Compensation and economy of growth. vi CONTENTS .
Página 4
... variation under domes- tication , afforded the best and safest clue . I may venture to express my conviction of the ... variations . I will then pass on to the variability of species in a state of nature ; but I shall , unfortunately ...
... variation under domes- tication , afforded the best and safest clue . I may venture to express my conviction of the ... variations . I will then pass on to the variability of species in a state of nature ; but I shall , unfortunately ...
Página 7
... VARIATION UNDER DOMESTICATION . Causes of Variability - Effects of Habit and the use or disuse of Parts - Correlated Variation - Inheritance - Character of Do- mestic Varieties - Difficulty of distinguishing between Varieties and ...
... VARIATION UNDER DOMESTICATION . Causes of Variability - Effects of Habit and the use or disuse of Parts - Correlated Variation - Inheritance - Character of Do- mestic Varieties - Difficulty of distinguishing between Varieties and ...
Página 8
... variation ; and that , when the organisation has once begun to vary , it generally continues varying for many generations ... variations arise under conditions which appear to be nearly uniform . The effects on the offspring are either ...
... variation ; and that , when the organisation has once begun to vary , it generally continues varying for many generations ... variations arise under conditions which appear to be nearly uniform . The effects on the offspring are either ...
Otras ediciones - Ver todas
Términos y frases comunes
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