Animal Life: A First Book of ZoölogyD. Appleton, 1901 - Всего страниц: 329 |
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Стр. 5
... pseudopods extend from the central body mass , and these projections are constantly changing , slowly pushing out or others believe that protoplasm exists as a foam work ; that it is a vis- cous liquid containing many fine globules ...
... pseudopods extend from the central body mass , and these projections are constantly changing , slowly pushing out or others believe that protoplasm exists as a foam work ; that it is a vis- cous liquid containing many fine globules ...
Стр. 9
... pseudopods , moves , ingests food particles , avoids sand grains , contracts if the water is heated , grows , and finally divides in two . 5. Paramecium . - Another protozoan which is common in stagnant pools and can be readily obtained ...
... pseudopods , moves , ingests food particles , avoids sand grains , contracts if the water is heated , grows , and finally divides in two . 5. Paramecium . - Another protozoan which is common in stagnant pools and can be readily obtained ...
Стр. 18
... pseudopods which project through the apertures in the shell , and enable the animal to swim and to get food . Most of the myriads of the simplest animals which swarm in the surface waters of the ocean belong to a few kinds of these ...
... pseudopods which project through the apertures in the shell , and enable the animal to swim and to get food . Most of the myriads of the simplest animals which swarm in the surface waters of the ocean belong to a few kinds of these ...
Стр. 39
... pseudopods or fine flagella . These projections are constantly changing : now two or three short , blunt pseudopods are projecting into the body cavity ; now they are withdrawn , and a few fine , long flagella are projected . In ...
... pseudopods or fine flagella . These projections are constantly changing : now two or three short , blunt pseudopods are projecting into the body cavity ; now they are withdrawn , and a few fine , long flagella are projected . In ...
Стр. 70
... pseudopods or flagella for seizing bits of food . The food caught by the tentacles comes into the ali- mentary sac through the opening or primitive mouth , and al c alc FIG . 32. - Diagrammatic sketch of a flat- worm ( Planaria ) ...
... pseudopods or flagella for seizing bits of food . The food caught by the tentacles comes into the ali- mentary sac through the opening or primitive mouth , and al c alc FIG . 32. - Diagrammatic sketch of a flat- worm ( Planaria ) ...
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adaptation adult alimentary canal Amaba ants become bees birds butterfly called cavity CLASS colony color complex animals composed conjugation crab crustaceans cytoplasm degeneration differentiation digestion divide ectoderm egg cells existence 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 organs 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 stage structure substance surface swim tentacles tion tissues vertebrates Volvox Vorticella wings workers worms young