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 12
... fishes and flowers , ferns and blades of grass , all these are objects of constant recognition . The green cloak which covers the brown earth is the shield under which myriads of organisms , brown and green , carry on their life work ...
... fishes and flowers , ferns and blades of grass , all these are objects of constant recognition . The green cloak which covers the brown earth is the shield under which myriads of organisms , brown and green , carry on their life work ...
Página 34
... fishes , amphibians , reptiles , birds , and. المال FIG . 21. - A group of stalked one - celled animals , Carchesium , sp . ( Adapted from Davenport , from a photograph of the liv- ing animals . ) grouped into two regions and the ...
... fishes , amphibians , reptiles , birds , and. المال FIG . 21. - A group of stalked one - celled animals , Carchesium , sp . ( Adapted from Davenport , from a photograph of the liv- ing animals . ) grouped into two regions and the ...
Página 35
David Starr Jordan, Vernon Lyman Kellogg. of fishes , amphibians , reptiles , birds , and mammals . In all the subdivisions of the main groups there are also to be recognized differentiated and di- vergent lesser lines of descent , and ...
David Starr Jordan, Vernon Lyman Kellogg. of fishes , amphibians , reptiles , birds , and mammals . In all the subdivisions of the main groups there are also to be recognized differentiated and di- vergent lesser lines of descent , and ...
Página 38
... fishes cannot live very long out of water and that birds cannot live in water . These , however , are conditions which depend on the special ecological habits of these two particular kinds of animals . The necessity of a constant and ...
... fishes cannot live very long out of water and that birds cannot live in water . These , however , are conditions which depend on the special ecological habits of these two particular kinds of animals . The necessity of a constant and ...
Página 39
... fish . According to L. J. Turner , the Alaska mud - fish ( Dallia ) , was fed frozen to Esquimaux dogs . One of these thawing in the stomach of the animal made its escape alive . Frogs lived after being kept at a temperature of -28 ° C ...
... fish . According to L. J. Turner , the Alaska mud - fish ( Dallia ) , was fed frozen to Esquimaux dogs . One of these thawing in the stomach of the animal made its escape alive . Frogs lived after being kept at a temperature of -28 ° C ...
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