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 6-10 de 58
Página xxii
... principle of natural selection is con- cerned , it is quite immaterial whether or not Professor Owen preceded me , for both of us , as shown in this historical sketch , were long ago preceded by Dr. Wells and Mr. Matthews . M. Isidore ...
... principle of natural selection is con- cerned , it is quite immaterial whether or not Professor Owen preceded me , for both of us , as shown in this historical sketch , were long ago preceded by Dr. Wells and Mr. Matthews . M. Isidore ...
Página xxiii
... principle of general gradation , that species have been modified ; and he attributes the modification to the change of circumstances . The author ( 1855 ) has also treated Psychology on the principle of the necessary acquirement of each ...
... principle of general gradation , that species have been modified ; and he attributes the modification to the change of circumstances . The author ( 1855 ) has also treated Psychology on the principle of the necessary acquirement of each ...
Página 5
... principle of inheri- tance , any selected variety will tend to propagate its new and modified form . This fundamental subject of Natural Selection will be treated at some length in the fourth chapter ; and we shall then see how Natural ...
... principle of inheri- tance , any selected variety will tend to propagate its new and modified form . This fundamental subject of Natural Selection will be treated at some length in the fourth chapter ; and we shall then see how Natural ...
Página 7
... Principles of Selection , anciently followed , their Effects- Methodical and Unconscious Selection - Unknown Origin of our Domestic Productions - Circumstances favourable to Man's power of Selection . Causes of Variability . WHEN we ...
... Principles of Selection , anciently followed , their Effects- Methodical and Unconscious Selection - Unknown Origin of our Domestic Productions - Circumstances favourable to Man's power of Selection . Causes of Variability . WHEN we ...
Página 14
... his fundamental belief : doubts have been thrown on this principle only by theoretical writers . When any deviation of structure often appears , and we see it in the father and child ,. 14 VARIATION UNDER DOMESTICATION . [ CHAP . I.
... his fundamental belief : doubts have been thrown on this principle only by theoretical writers . When any deviation of structure often appears , and we see it in the father and child ,. 14 VARIATION UNDER DOMESTICATION . [ CHAP . I.
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