. A critique of the theory of evolution. Evolution. THEORY OF EVOLUTION 65 There lias appeared in our cultures a fly in which the third division of the thorax with its appendages has changed into a segment like the second (fig. 29). It is smaller than the. Fig. 29. Mutant race of fruit H} cate mesothorax on dorsal side. [h intercalated dupli- normal mesothorax and its wings are imper- fectly developed, but the bristles on the upper surface may have the typical arrangement of the normal mesothorax. The mutant shows how great a change may result from a single factor difference. A factor that cau
. A critique of the theory of evolution. Evolution. THEORY OF EVOLUTION 65 There lias appeared in our cultures a fly in which the third division of the thorax with its appendages has changed into a segment like the second (fig. 29). It is smaller than the. Fig. 29. Mutant race of fruit H} cate mesothorax on dorsal side. [h intercalated dupli- normal mesothorax and its wings are imper- fectly developed, but the bristles on the upper surface may have the typical arrangement of the normal mesothorax. The mutant shows how great a change may result from a single factor difference. A factor that causes duplication in the legs. 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
