Scorpions occupy every continent except Antarctica, and all scorpionsfluoresce under ultraviolet light. What do these observations mostlikely suggest about the origin of scorpion fluorescence?a. The common ancestor of scorpions fluoresced.b. Scorpion fluorescence evolved independently on each continent.c. Scorpion fluorescence is a vestigial characteristic.d. Scorpion fluorescence evolved recently.

Human Anatomy & Physiology (11th Edition)
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Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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Scorpions occupy every continent except Antarctica, and all scorpions
fluoresce under ultraviolet light. What do these observations most
likely suggest about the origin of scorpion fluorescence?
a. The common ancestor of scorpions fluoresced.
b. Scorpion fluorescence evolved independently on each continent.
c. Scorpion fluorescence is a vestigial characteristic.
d. Scorpion fluorescence evolved recently.

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