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 42
... tail hairs in water troughs , and bacteria and infusoria in infusions of beef or hay have been shown on scientific investi- gation to be utterly with- out basis of fact . But if protoplasm and life do not appear , are not being ...
... tail hairs in water troughs , and bacteria and infusoria in infusions of beef or hay have been shown on scientific investi- gation to be utterly with- out basis of fact . But if protoplasm and life do not appear , are not being ...
Página 69
... have a black blotch on the breast or the outer tail feathers white . Yet all meadow larks have these marks , as all shore larks possess the tiny plume behind the ear . Any character of 6 NATURAL SELECTION ; SEXUAL SELECTION 69.
... have a black blotch on the breast or the outer tail feathers white . Yet all meadow larks have these marks , as all shore larks possess the tiny plume behind the ear . Any character of 6 NATURAL SELECTION ; SEXUAL SELECTION 69.
Página 73
... tail blotches , and such other con- spicuous color spots and mark- ings possessed by the males and wanting in the females of various bird species ) , or , finally , char- acters connected with special habits of one sex differing from ...
... tail blotches , and such other con- spicuous color spots and mark- ings possessed by the males and wanting in the females of various bird species ) , or , finally , char- acters connected with special habits of one sex differing from ...
Página 82
... tail ; this black spot is lacking in the sheep of Devon . In the Cheviot sheep the face and ears are white , the head free from wool , while the ears , unlike those of most of the others , stand erect . In the dun - faced Shropshire ...
... tail ; this black spot is lacking in the sheep of Devon . In the Cheviot sheep the face and ears are white , the head free from wool , while the ears , unlike those of most of the others , stand erect . In the dun - faced Shropshire ...
Página 120
... tail feathers colored like the body , and without the white spot on the outer feathers shown in most of the other wood warblers composing the genus Dendroica . The yellow warbler throughout its range is very uniform in size and color ...
... tail feathers colored like the body , and without the white spot on the outer feathers shown in most of the other wood warblers composing the genus Dendroica . The yellow warbler throughout its range is very uniform in size and color ...
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