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 5
... islands and river basins are shaped . Thus organisms are derived from parent organisms . Thus all the variant chemical elements may have been ( hypo- thetically ) derived through influences as yet not even imagined , from the unknown ...
... islands and river basins are shaped . Thus organisms are derived from parent organisms . Thus all the variant chemical elements may have been ( hypo- thetically ) derived through influences as yet not even imagined , from the unknown ...
Página 24
... islands , and there may be every conceivable degree of width or breadth of channel which seems to separate one island or group of islands from another . CHAPTER III LIFE , ITS PHYSICAL BASIS AND SIMPLEST EXPRESSION 24 EVOLUTION AND ...
... islands , and there may be every conceivable degree of width or breadth of channel which seems to separate one island or group of islands from another . CHAPTER III LIFE , ITS PHYSICAL BASIS AND SIMPLEST EXPRESSION 24 EVOLUTION AND ...
Página 121
... island of Grand Cayman'is a similar bird , a little smaller , Dendroica auricapilla . Of a deeper yellow than ... islands are smaller golden warblers with the wing less than five inches long , and with the crown tawny red , as in ...
... island of Grand Cayman'is a similar bird , a little smaller , Dendroica auricapilla . Of a deeper yellow than ... islands are smaller golden warblers with the wing less than five inches long , and with the crown tawny red , as in ...
Página 122
... island , give their actual traits to their actual descendants , and the traits enforced by natural selection differ from island to island . If external conditions were alike in all the islands the progress of evolution would perhaps run ...
... island , give their actual traits to their actual descendants , and the traits enforced by natural selection differ from island to island . If external conditions were alike in all the islands the progress of evolution would perhaps run ...
Página 123
... Island ( Hawaii ) have become classical . According to Mr. Gulick , the land snails of the wooded portion of Oahu have become split up into about 175 species of land shells represented by 700 or 800 varieties . He frequently finds a ...
... Island ( Hawaii ) have become classical . According to Mr. Gulick , the land snails of the wooded portion of Oahu have become split up into about 175 species of land shells represented by 700 or 800 varieties . He frequently finds a ...
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