Animal Life: A First Book of ZoölogyD. Appleton, 1900 - 329 páginas |
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Página 5
... pseudopods extend from the central body mass , and these projections are constantly changing , slowly pushing out or others believe that protoplasm exists as a foam work ; that it is a vis- cous liquid containing many fine globules ...
... pseudopods extend from the central body mass , and these projections are constantly changing , slowly pushing out or others believe that protoplasm exists as a foam work ; that it is a vis- cous liquid containing many fine globules ...
Página 9
... pseudopods , moves , ingests food particles , avoids sand grains , contracts if the water is heated , grows , and finally divides in two . 5. Paramecium . - Another protozoan which is common in stagnant pools and can be readily obtained ...
... pseudopods , moves , ingests food particles , avoids sand grains , contracts if the water is heated , grows , and finally divides in two . 5. Paramecium . - Another protozoan which is common in stagnant pools and can be readily obtained ...
Página 18
... pseudopods which project through the apertures in the shell , and enable the animal to swim and to get food . Most of the myriads of the simplest animals which swarm in the surface waters of the ocean belong to a few kinds of these ...
... pseudopods which project through the apertures in the shell , and enable the animal to swim and to get food . Most of the myriads of the simplest animals which swarm in the surface waters of the ocean belong to a few kinds of these ...
Página 39
... pseudopods or fine flagella . These projections are constantly changing : now two or three short , blunt pseudopods are projecting into the body cavity ; now they are withdrawn , and a few fine , long flagella are projected . In ...
... pseudopods or fine flagella . These projections are constantly changing : now two or three short , blunt pseudopods are projecting into the body cavity ; now they are withdrawn , and a few fine , long flagella are projected . In ...
Página 70
... pseudopods or flagella for seizing bits of food . The food caught by the tentacles comes into the ali- mentary sac through the opening or primitive mouth , and al c alc FIG . 32. - Diagrammatic sketch of a flat- worm ( Planaria ) ...
... pseudopods or flagella for seizing bits of food . The food caught by the tentacles comes into the ali- mentary sac through the opening or primitive mouth , and al c alc FIG . 32. - Diagrammatic sketch of a flat- worm ( Planaria ) ...
Outras edições - Ver tudo
Animal Life: A First Book of Zoölogy David Starr Jordan,Vernon Lyman Kellogg Visualização integral - 1900 |
Animal Life: A First Book of Zoölogy David Starr Jordan,Vernon Lyman Kellogg Visualização integral - 1912 |
Animal Life: A First Book of Zoölogy David Starr Jordan,Vernon Lyman Kellogg Visualização integral - 1900 |
Palavras e frases frequentes
adaptation alimentary canal Amaba ants auditory barriers become bees birds body butterfly California called caterpillars cavity chitinous CLASS colony color common complex animals composed conjugation crab crustaceans differentiation digestive divide division ectoderm egg cells eyes fauna feed female fishes flagella free-swimming function habits hatched higher animals Hydra inclosed individuals insects instinct islands jelly-fishes kinds of animals larva larvæ layer live lower male mals mammals many-celled animals mass medusæ mimicry Monarch butterfly moth naturalists nerve nest nucleus ocean one-celled outer Pandorina papillæ Paramecium parasites parent plants polyp possess prey primitive processes produced protective resemblance protoplasm Protozoa pseudopods Radiolaria realm reflex action region reproductive cells River Sacculina simple simplest animals single cell smell special senses species sperm cells spherical spiders sponge stage streams structure substance surface swim tentacles tion trout vertebrates Volvox Vorticella wall wings worms young
Passagens conhecidas
Página 115 - There is no exception to the rule that every organic being naturally increases at so high a rate, that, if not destroyed, the earth would soon be covered by the progeny of a single pair. Even slow-breeding man has doubled in twenty-five years, and at this rate, in less than a thousand years, there would literally not be standing room for his progeny.
Página 88 - Fig. 145 are indistinguishably alike, but one embryo is sure to develop into a fish and the other into a salamander. This certainty of an embryo to become an individual of a certain kind is called the law of heredity.
Página 215 - He cannot be mistaken for any other, and his flaming vest and blue stockings show that he does not court concealment. He is very abundant in the damp woods, and I was convinced he was uneatable so soon as I made his acquaintance and saw the happy sense of security with which he hopped about. I took a few specimens home with me, and tried my fowls and ducks with them ; but none would touch them. At last, by throwing down pieces of meat, for which there was a great competition amongst them, I managed...
Página 164 - Russian naturalist, of the hunting habits of the great white-tailed eagle (Haliattos albicilla) on the Russian steppes shows that this kind of eagle at least has adopted a gregarious habit, in which mutual help is plainly obvious. This naturalist once saw an eagle high in the air, circling slowly and widely in perfect silence. Suddenly the eagle screamed loudly. " Its cry was soon answered by another eagle, which approached it, and was followed by a third, a fourth, and so on, till nine or ten eagles...