. Life and love. Biology; Reproduction. 154 Life and Love. ~--^- \â^r»V Doubtless there was orig- ""^^^^^^jJ^ inally but one sex,â from â¢l/ the simple substance of the ,v' simple creature were budded reproduc- es tive cells capable of developing with- *^ out union with other cells. Gradually, ,£' as the life became more complex, '*, there was a division into two sexes. |\ Hints of the original one-sex method "- still linger in curious and instructive i^ abundance, however, â certain creatures ^^^ Still reverting to it upon occasion ; some â fee insects, for instance, at certa
. Life and love. Biology; Reproduction. 154 Life and Love. ~--^- \â^r»V Doubtless there was orig- ""^^^^^^jJ^ inally but one sex,â from â¢l/ the simple substance of the ,v' simple creature were budded reproduc- es tive cells capable of developing with- *^ out union with other cells. Gradually, ,£' as the life became more complex, '*, there was a division into two sexes. |\ Hints of the original one-sex method "- still linger in curious and instructive i^ abundance, however, â certain creatures ^^^ Still reverting to it upon occasion ; some â fee insects, for instance, at certain seasons '^â¢^^ of abundance laying eggs which de- ^^^ velop without fertilization, while at ^A'3" other seasons, of diminished abundance, ^-^ the eggs are always fertilized. "^Tf^x\ There are crustaceans which have the /⢠, .^* habit of laying eggs capable of devel- .i7',0 oping without fertilization, and high up \.':!'f^%' in life, even to the mammals, there '' ' have been observed the first changes (/.Al\^/ in the unfertilized egg, â changes which usually take place only after fertiliza- tion. These changes pro- ceeded but a little way, how- ever, never de- eping into the later 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 Morley, Margaret Warner, 1858-1923. Chicago, A. C. McClurg and Company
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Keywords: ., bookcentury1800, bookdecad, booksubjectreproduction, bookyear1895
