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 |
No interior do livro
Resultados 1-5 de 49
Página 32
... habit and habitat . We try to distin- guish them as single - celled animals ( Protozoa ) and single - celled plants ( Protophyta ) , on the basis of alleged differences in their habit of food - taking and general nutrition . This ...
... habit and habitat . We try to distin- guish them as single - celled animals ( Protozoa ) and single - celled plants ( Protophyta ) , on the basis of alleged differences in their habit of food - taking and general nutrition . This ...
Página 38
... habits of these two particular kinds of animals . The necessity of a constant and sufficient supply of oxygen is a necessity common to both . It is one of the primary conditions of their life . All animals must have air . Similarly both ...
... habits of these two particular kinds of animals . The necessity of a constant and sufficient supply of oxygen is a necessity common to both . It is one of the primary conditions of their life . All animals must have air . Similarly both ...
Página 63
... 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 the num- ber of cats ; and Colonel Newman says : ' Near ...
... 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 the num- ber of cats ; and Colonel Newman says : ' Near ...
Página 73
... habits of one sex differing from FIG . 42. - Fore leg of male water beetle , those of the other ( the pollen baskets and wax plates of the Dyticus , showing special suckerlike expansion of the leg . ( After Miall . ) worker female honey ...
... habits of one sex differing from FIG . 42. - Fore leg of male water beetle , those of the other ( the pollen baskets and wax plates of the Dyticus , showing special suckerlike expansion of the leg . ( After Miall . ) worker female honey ...
Página 109
... habits of life , or occupies a somewhat different station in the economy of nature , homogamy arises within that section . There are forms of homogamy on which Darwin has laid great stress , as we shall presently find . Again , when for ...
... habits of life , or occupies a somewhat different station in the economy of nature , homogamy arises within that section . There are forms of homogamy on which Darwin has laid great stress , as we shall presently find . Again , when for ...
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