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 63
... nests ; and Colonel Newman , who has long attended to the habits of humble - bees , believes that more than two - thirds of them are thus destroyed all over England . Now the number of mice is largely dependent , as everyone knows , on ...
... nests ; and Colonel Newman , who has long attended to the habits of humble - bees , believes that more than two - thirds of them are thus destroyed all over England . Now the number of mice is largely dependent , as everyone knows , on ...
Página 129
... nest . That which interests us now is that not one of these varied traits is clearly related to any principle of utility . Adaptation is evident enough , but each species is as well fitted for its life as any other , and no ...
... nest . That which interests us now is that not one of these varied traits is clearly related to any principle of utility . Adaptation is evident enough , but each species is as well fitted for its life as any other , and no ...
Página 249
... nests of Japanese boxes , the outer one encasing a smaller and this still a smaller , and this yet a smaller and so on , the young and future young of any kind of organism were , according to this encasement theory of the germ cell ...
... nests of Japanese boxes , the outer one encasing a smaller and this still a smaller , and this yet a smaller and so on , the young and future young of any kind of organism were , according to this encasement theory of the germ cell ...
Página 328
... Nest of Vespa , a social wasp . ( Photograph by A. L. Melander and C. T. Brues . ) for survival in the tropics . It is one advantage of man , as compared with other forms of life , that so many of his adapta- tions are external to his ...
... Nest of Vespa , a social wasp . ( Photograph by A. L. Melander and C. T. Brues . ) for survival in the tropics . It is one advantage of man , as compared with other forms of life , that so many of his adapta- tions are external to his ...
Página 338
... nest , the establishment of a home , and the continued care of one or both of the parents . The very lowest mammals known , the duck bills ( Mono- tremes ) of Australia , lay large eggs in a strong shell like those of a turtle , and ...
... nest , the establishment of a home , and the continued care of one or both of the parents . The very lowest mammals known , the duck bills ( Mono- tremes ) of Australia , lay large eggs in a strong shell like those of a turtle , and ...
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