Animal Life: A First Book of ZoölogyD. Appleton, 1900 - 329 páginas |
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Página 2
... one kind can be called simplest . Some of these kinds are spherical in shape ... cell . The whole body of any one of the simplest animals or Protozoa is ... celled animal . The animal cell is rarely typically cellular in character ...
... one kind can be called simplest . Some of these kinds are spherical in shape ... cell . The whole body of any one of the simplest animals or Protozoa is ... celled animal . The animal cell is rarely typically cellular in character ...
Página 3
... cell , an inner denser mass called the nucleus , and an outer , clearer , inclosing mass called the cytoplasm . There may be more than one nucleus in a cell . Sometimes the cell is inclosed by a cell wall which may be simply a tougher ...
... cell , an inner denser mass called the nucleus , and an outer , clearer , inclosing mass called the cytoplasm . There may be more than one nucleus in a cell . Sometimes the cell is inclosed by a cell wall which may be simply a tougher ...
Página 5
... cell can do . The body of one of the minute animals in the water - drop is a single cell . The body is not composed of organs of different parts , as in the body of the horse . There is no heart , no stomach ; there are no muscles , no ...
... cell can do . The body of one of the minute animals in the water - drop is a single cell . The body is not composed of organs of different parts , as in the body of the horse . There is no heart , no stomach ; there are no muscles , no ...
Página 6
... 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- plex animals do . If one of the finger - like projections of the Amaba , or , indeed , if any part of its ...
... 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- plex animals do . If one of the finger - like projections of the Amaba , or , indeed , if any part of its ...
Página 7
... one side . The Amoeba feels . It shows the effects of stimulation . Its movements can be changed , stopped , or ... one - celled plant . - After VERWORN . FIG . 11. - Heliosphæra actinota ( after HAECKEL ). THE LIFE OF THE SIMPLEST ANIMALS 7.
... one side . The Amoeba feels . It shows the effects of stimulation . Its movements can be changed , stopped , or ... one - celled plant . - After VERWORN . FIG . 11. - Heliosphæra actinota ( after HAECKEL ). THE LIFE OF THE SIMPLEST ANIMALS 7.
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...