The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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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 ...
Contents
would become the principal reserve asset while gold | 36 |
Excretion the elimination of the waste products of | 50 |
Volumes | 431 |
Copyright | |
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Common terms and phrases
acid activity amount animals appears become blood body called carried cause cells century changes chemical close common complete consists containing continuous countries depends direction early effect evidence evolution example existence farm federal ferns fibres field Figure fire function gametophyte give groups important increase interest Italy kidney known later leaves less light lines living major marriage material means ment method move movements muscle natural normal obtained occur organs origin percent period person plants position possible present pressure problems produced properties protection reduced remain renal response result retina selection similar social species structure supply surface temperature tend tion types United urine usually various vary