The New Encyclopaedia Britannica, Volumes 1-10Encyclopaedia Britannica, 1974 - Reference [1] Propaedia: outline of knowledge and guide to the Britannica.--[2]-[11] Micropaedia: ready reference and index.--[12]-[30] Macropaedia: knowledge in depth. |
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Page 9
... organs ( halteres ) that help in flight . Some fish have utilized the electrical potential of specialized muscles in organs whose elec- trical discharge is strong enough to serve as a sort of radar emission . The echo , perceived by ...
... organs ( halteres ) that help in flight . Some fish have utilized the electrical potential of specialized muscles in organs whose elec- trical discharge is strong enough to serve as a sort of radar emission . The echo , perceived by ...
Page 240
... organs of ferns are differentiated . The sperm - producing organs , antheridia , are composed of a sterile jacket of cells and sperm - pro- ducing cells within . The antheridia may be sunken ( as in the families Ophioglossaceae and ...
... organs of ferns are differentiated . The sperm - producing organs , antheridia , are composed of a sterile jacket of cells and sperm - pro- ducing cells within . The antheridia may be sunken ( as in the families Ophioglossaceae and ...
Page 335
... organ . Some fishes with such accessory organs are obligate air breathers and will drown if denied access to the surface , even in well- oxygenated water . Fishes with a hydrostatic form of swim bladder can control their depth by ...
... organ . Some fishes with such accessory organs are obligate air breathers and will drown if denied access to the surface , even in well- oxygenated water . Fishes with a hydrostatic form of swim bladder can control their depth by ...
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The New Encyclopaedia Britannica, Volumes 1-10 Encyclopaedia Britannica Publishers, Inc. Staff No preview available - 1974 |
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