Animal Life: A First Book of ZoölogyD. Appleton, 1900 - 329 páginas |
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Página ix
... Reflex action , 241. - Instinct , 242. - Classifica- tion of instincts , 243. - Feeding , 244. - Self - defense , 245. - Play , 247. - Climate , 248. - Environment , 248. - Courtship , 248. - Repro- duction , 249. - Care of the young ...
... Reflex action , 241. - Instinct , 242. - Classifica- tion of instincts , 243. - Feeding , 244. - Self - defense , 245. - Play , 247. - Climate , 248. - Environment , 248. - Courtship , 248. - Repro- duction , 249. - Care of the young ...
Página 222
... action which strengthen and make more pronounced the deception of shape and color . But these habits , too , are the result of a long development , and are instinctive or reflex - that is , performed without the exercise of volition or ...
... action which strengthen and make more pronounced the deception of shape and color . But these habits , too , are the result of a long development , and are instinctive or reflex - that is , performed without the exercise of volition or ...
Página 241
... action . If an organism is not to act , it can not feel , and the intensity of its feeling is related to its power to act . 128. Reflex action . These impressions brought to the brain by the sensory nerves represent in some degree the ...
... action . If an organism is not to act , it can not feel , and the intensity of its feeling is related to its power to act . 128. Reflex action . These impressions brought to the brain by the sensory nerves represent in some degree the ...
Página 242
... Reflex action is in general uncon- scious , but with animals as with man it shades by degrees into conscious action , and into volition or action " done on purpose . ' 99 129. Instinct . - Different one - celled animals show differ ...
... Reflex action is in general uncon- scious , but with animals as with man it shades by degrees into conscious action , and into volition or action " done on purpose . ' 99 129. Instinct . - Different one - celled animals show differ ...
Página 243
... actions repeated till they become a " second nature ever leave a trace upon heredity . Such investigators regard ... reflex action having perished , leaving no pos- terity . An example in point would be the homing instinct of the fur ...
... actions repeated till they become a " second nature ever leave a trace upon heredity . Such investigators regard ... reflex action having perished , leaving no pos- terity . An example in point would be the homing instinct of the fur ...
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...