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Practice Reading: Fill in The Blanks (Drag & Drop)
ID: #46832
Sight form
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Sight is the result of the conversion of one form of motion into another. Thus, of light coming from a luminous body are by the pigment-cells of the retina in our eyes and are transmuted into another form of . It would seem then that eyes of very simple construction would amply satisfy the of thousands of creatures whose existence does not upon vision.
arrested
needs
depend
waves
motion
sight
fall
shades
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