Evolution and animal life, an elementary discussion of facts, processes, laws and theories relating to the life and evolution of animalsD. Appleton, 1908 - 489 páginas |
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Página viii
... Actual standing of Darwinism , 70 ; Secondary sexual dif- ferences , 71 ; Classification of secondary sexual characters , 72 ; Theory of sexual selection , 75 ; Criticisms of the theory , 77 ; The sexual selection theory largely ...
... Actual standing of Darwinism , 70 ; Secondary sexual dif- ferences , 71 ; Classification of secondary sexual characters , 72 ; Theory of sexual selection , 75 ; Criticisms of the theory , 77 ; The sexual selection theory largely ...
Página ix
... Actual effects of environment , 205 ; Ontogenetic species , 206 . CHAPTER XII . - GENERATION , SEX , AND ONTOGENY . Generation and ontogeny , 211 ; Spontaneous generation or abio- genesis , 212 ; Simplest modes of generation , 213 ...
... Actual effects of environment , 205 ; Ontogenetic species , 206 . CHAPTER XII . - GENERATION , SEX , AND ONTOGENY . Generation and ontogeny , 211 ; Spontaneous generation or abio- genesis , 212 ; Simplest modes of generation , 213 ...
Página 2
... actual now must have been the possible before ; what- ever actually takes place was a possibility before it happened . The word evolution , then , belongs to philosophy rather than to science . In the philosophy of nature the idea that ...
... actual now must have been the possible before ; what- ever actually takes place was a possibility before it happened . The word evolution , then , belongs to philosophy rather than to science . In the philosophy of nature the idea that ...
Página 6
... actual functions of actual organs . Tendencies in inorganic nature are due to the interrelations of mass and force , whatever may be the final meanings attached to these terms or to the terms matter and energy . It is not clear that ...
... actual functions of actual organs . Tendencies in inorganic nature are due to the interrelations of mass and force , whatever may be the final meanings attached to these terms or to the terms matter and energy . It is not clear that ...
Página 9
... actual sequence of events it is , in fact , but man knows nothing of what is necessary , only of what has been ascertained to occur . Because human observation and logic can be only partial no law of life can be fully stated . Because ...
... actual sequence of events it is , in fact , but man knows nothing of what is necessary , only of what has been ascertained to occur . Because human observation and logic can be only partial no law of life can be fully stated . Because ...
Outras edições - Ver tudo
Evolution and Animal Life: An Elementary Discussion of Facts, Processes ... David Starr Jordan,Vernon Lyman Kellogg Visualização integral - 1907 |
Evolution and Animal Life: An Elementary Discussion of Facts, Processes ... David Starr Jordan,Vernon Lyman Kellogg Visualização integral - 1907 |
Evolution and animal life, an elementary discussion of facts, processes ... David Starr Jordan,Vernon Lyman Kellogg Visualização integral - 1907 |
Palavras e frases frequentes
actual adaptation adult animals animals and plants ants apes appear artificial selection bees beetles biologists birds body breeding butterfly called causes centrosome changes CHAPTER characters chromatin chromosomes color and pattern common crab Darwin degeneration degree descent differentiation division egg cell embryo environment existence fact factors fauna female fertilized fishes forms fossils genus germ cells habit hatched heredity honeybee host hybrid individuals influence inheritance insects instinct islands isolation kinds of animals known larva larvæ live lower male mammals matter ment modified mutations natural selection naturalists nest nucleus offspring organic evolution origin Origin of Species parasites parent phenomena plasm primitive produced protoplasm Protozoa race relation reproduction reptiles resemblance Sacculina sea anemone sexual sexual selection sheep species species-forming sperm spines stage structure substance tail theory tion traits tree variation various vertebrates Weismann wings workers young