Animal Life: A First Book of ZoölogyD. Appleton, 1900 - 329 páginas |
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Página 2
... spherical in shape , some elliptical or football - shaped , some conical , some flattened . Some have many fine , minute hairs projecting from the surface ; some have a few longer , stronger hairs that lash back and forth in the water ...
... spherical in shape , some elliptical or football - shaped , some conical , some flattened . Some have many fine , minute hairs projecting from the surface ; some have a few longer , stronger hairs that lash back and forth in the water ...
Página 21
... spherical form is the simplest and most conven- ient shape for such a body . It is interesting to note that the spherical form is the common shape of the egg cell of the higher animals . Each one of the higher , multicellular animals ...
... spherical form is the simplest and most conven- ient shape for such a body . It is interesting to note that the spherical form is the common shape of the egg cell of the higher animals . Each one of the higher , multicellular animals ...
Página 22
... spherical or sub- spherical Protozoa . That the simplest animals , despite the lack of organs and the primitive way of performing the life processes , live successfully is evident from their existence in such ex- traordinary numbers ...
... spherical or sub- spherical Protozoa . That the simplest animals , despite the lack of organs and the primitive way of performing the life processes , live successfully is evident from their existence in such ex- traordinary numbers ...
Página 25
... spherical in shape . In most of the colonies each of the cells possesses two or three long , pro- toplasmic , whiplash - like hairs , called flagella , and by the lashing of these flagella in the water the whole group swims about . 14 ...
... spherical in shape . In most of the colonies each of the cells possesses two or three long , pro- toplasmic , whiplash - like hairs , called flagella , and by the lashing of these flagella in the water the whole group swims about . 14 ...
Página 26
... spherical instead of a plate - like colony ( Fig . 13 ) . In Pan- dorina morum the colony consists of sixteen ovoid cells in a spherical jelly - like mass . Each cell has two flagella , and by the lashing of all the flagella the whole ...
... spherical instead of a plate - like colony ( Fig . 13 ) . In Pan- dorina morum the colony consists of sixteen ovoid cells in a spherical jelly - like mass . Each cell has two flagella , and by the lashing of all the flagella the whole ...
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...