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Animals must perceive their own movements to balance themselves and to move
effectively; without such perceptual functions the chances for survival would be
sharply reduced. VISUAL CUES The eye is by far the most effective organ for ...
Visual movement in depth. An object moving directly away from an observer
provides fewer visual cues of movement than it would by moving across the field
of view. However, changes in retinal-image size are produced that give a clue to
The concentration of this exudate, multiplied by the measured average velocity, is
of the same order of magnitude as specific mass transfer, indicating that liquid
movement through sieve tubes could account for transport. Much of the ...
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The New Encyclopaedia Britannica (Encyclopaedia)User Review - Not Available - Book Verdict
For virtually all its 238 years,Britannica has ruled the shelves as a peerless general encyclopedia. Reviewers have consistently given it high marks for most of the 12 criteria identified inKister's ... Read full review