Structural features and adaptive propert
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Ripps, Harris ;Dowling, John E.
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Article
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1990
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John Wiley and Sons
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English
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In the duplex (rod/cone) retinae of most vertebrates, electrical responses associated with nocturnal vision can be recorded in relative isolation only over a limited intensity range before there is encroachment by signals from the cone system; e.g., at mesopic levels of illumination, the rods begin