Animal Life: A First Book of ZoölogyD. Appleton, 1900 - 329 páginas |
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Página ix
... tion of instincts , 243. - Feeding , 244. - Self - defense , 245. - Play , 247. - Climate , 248. - Environment , 248. - Courtship , 248. - Repro- duction , 249. - Care of the young , 250.- Variability of instincts , 251. - Reason , 251 ...
... tion of instincts , 243. - Feeding , 244. - Self - defense , 245. - Play , 247. - Climate , 248. - Environment , 248. - Courtship , 248. - Repro- duction , 249. - Care of the young , 250.- Variability of instincts , 251. - Reason , 251 ...
Página 4
... tion of the protoplasm . " * * The physical structure of protoplasm has been much studied , but even with the improved microscopes and other instruments neces- sary for the study of minute structure , naturalists are still very far from ...
... tion of the protoplasm . " * * The physical structure of protoplasm has been much studied , but even with the improved microscopes and other instruments neces- sary for the study of minute structure , naturalists are still very far from ...
Página 6
... tion - the Amoeba moves . There are no muscles in this tiny body ; muscles are composed of many contractile cells massed together , and the Amoeba is but one cell . But it is a contractile cell ; it can do what the muscles of the com ...
... tion - the Amoeba moves . There are no muscles in this tiny body ; muscles are composed of many contractile cells massed together , and the Amoeba is but one cell . But it is a contractile cell ; it can do what the muscles of the com ...
Página 8
... tion in its simplest degree . If food is abundant the Amaba soon increases in size . The bulk of its body is bound to increase if new substance FIG . 4. - Amaba polypodia in six successive stages of division . The dark , white- margined ...
... tion in its simplest degree . If food is abundant the Amaba soon increases in size . The bulk of its body is bound to increase if new substance FIG . 4. - Amaba polypodia in six successive stages of division . The dark , white- margined ...
Página 27
... tion . But the process of mul- tiplication , which includes conjugation , is different from that process in Pandorina , in that in Eudorina the conju- gating cells are of two distinctly different kinds . When THE LIFE OF THE SLIGHTLY ...
... tion . But the process of mul- tiplication , which includes conjugation , is different from that process in Pandorina , in that in Eudorina the conju- gating cells are of two distinctly different kinds . When THE LIFE OF THE SLIGHTLY ...
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...