Animal Life: A First Book of ZoölogyD. Appleton, 1900 - Всего страниц: 329 |
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Стр. 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 ...
Стр. 2
... 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 ...
Стр. 4
... tion of the protoplasm . " 99 * * 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 ...
... tion of the protoplasm . " 99 * * 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 ...
Стр. 6
... tion - the Amoeba moves . There are no muscles in this tiny body ; muscles are composed of many contractile cells massed together , and the Ameba 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 Ameba is but one cell . But it is a contractile cell ; it can do what the muscles of the com ...
Стр. 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 ...
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adaptation adult alimentary canal Amaba ants become bees birds butterfly called cavity chitin CLASS colony color complex animals composed conjugation crab crustaceans cytoplasm degeneration differentiation digestion divide ectoderm egg cells eyes fauna feed female fish flagella free-swimming function gastrula Globigerinæ habits hatched higher animals host Hydra inclosed increase individuals insects instinct intestine islands jelly-fishes kinds of animals larva larvæ layer live male mals mammals many-celled animals mass medusa mouth opening naturalists nerve nest nucleus ocean oesophagus one-celled outer oxygen Pandorina papillæ Paramecium parasites parent perform plants polyp prey primitive processes produced protective resemblance protoplasm Protozoa pseudopods queen Radiolaria reflex action reproductive cells Sacculina sea-anemone shape shell simple simplest animals single cell special sense species sperm cells spherical spiders sponge spores stage structure substance surface swimming tentacles tion vertebrates Volvox Vorticella wings workers worms young