. A critique of the theory of evolution. Evolution. THEORY OF EVOLUTION 67 amined. Formerly we were taught that eye- less annuals arose in caves. This case shows that they may also arise suddenly in glass milk bottles, by a change in a single factor. I may recall in this connection that wingless flies (fig. 5 f) also arose in our cultures by a single mutation. We used to be told that wingless insects occurred on desert islands be- cause those insects that had tlie best developed wings had been blown out to sea. Whetlier this is true or not, I will not pretend to say, but at any rate wingless i
. A critique of the theory of evolution. Evolution. THEORY OF EVOLUTION 67 amined. Formerly we were taught that eye- less annuals arose in caves. This case shows that they may also arise suddenly in glass milk bottles, by a change in a single factor. I may recall in this connection that wingless flies (fig. 5 f) also arose in our cultures by a single mutation. We used to be told that wingless insects occurred on desert islands be- cause those insects that had tlie best developed wings had been blown out to sea. Whetlier this is true or not, I will not pretend to say, but at any rate wingless insects may also arise, not through a slow process of elimination, but at a single step. The preceding examples have all related. Fig. 31. Mutant race of fruit fiy called bar to the right (normal to the left). The eye is a narrow vertical bar, the outline of the original eye is Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Morgan, Thomas Hunt, 1866-; Princeton University. Louis Clark Vanuxem Foundation. Princeton University Press; [etc. ]
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectevoluti, bookyear1916
