. Animal biology. Biology; Zoology; Physiology. SURVEY OF UNICELLULAR ANIMALS 51 stance, Euglena is an organism that is claimed by both zoologists and botanists: by the former because it can employ complex food materials, and by the latter because in the presence of sunlight it can manufacture its own food. Such forms attest the fact that it is impossible to distinguish sharply the so-called animal and plant kingdoms — one merges into the other when the primitive forms of life are approached. Our classifications fail at the lowest level. ?»?.?? -H» ??• •• • •';>? *-•? • •..-;.•.;.*,? mm I I
. Animal biology. Biology; Zoology; Physiology. SURVEY OF UNICELLULAR ANIMALS 51 stance, Euglena is an organism that is claimed by both zoologists and botanists: by the former because it can employ complex food materials, and by the latter because in the presence of sunlight it can manufacture its own food. Such forms attest the fact that it is impossible to distinguish sharply the so-called animal and plant kingdoms — one merges into the other when the primitive forms of life are approached. Our classifications fail at the lowest level. ?»?.?? -H» ??• •• • •';>? *-•? • •..-;.•.;.*,? mm I I I Trachelomonas Fig. 23. «" Peranema. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Woodruff, Lorande Loss, 1879-1947. New York The Macmillan company
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Keywords: ., bookcentury1900, books, booksubjectphysiology, booksubjectzoology
