Science, Volumen51John Michels (Journalist) American Association for the Advancement of Science, 1920 Since Jan. 1901 the official proceedings and most of the papers of the American Association for the Advancement of Science have been included in Science. |
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Página 127
... gametes in all but the very lowermost of protista , has become so largely known as to make it hard to think of any bit of existing protoplasm as other than a fragment of one primordial protoplast , or to think of a proto- plast of today ...
... gametes in all but the very lowermost of protista , has become so largely known as to make it hard to think of any bit of existing protoplasm as other than a fragment of one primordial protoplast , or to think of a proto- plast of today ...
Página 376
... gametes are repre- sented arising from sexually different plants designated by the signs plus and minus which will ... gametes , are cut off . The dissolution of the interven- ing cross wall allows a fusion of the gametes and the zygote ...
... gametes are repre- sented arising from sexually different plants designated by the signs plus and minus which will ... gametes , are cut off . The dissolution of the interven- ing cross wall allows a fusion of the gametes and the zygote ...
Página 377
... gamete which is formed in this reaction transforms itself frequently into a thick - walled a - zygospore . The stimulus which leads to a dissolving away of the wall between the two gametes and their conse- quent fusion is constantly ...
... gamete which is formed in this reaction transforms itself frequently into a thick - walled a - zygospore . The stimulus which leads to a dissolving away of the wall between the two gametes and their conse- quent fusion is constantly ...
Página 378
... gametes are typically equal in size . In making the diagram , it was observed that of those species , in which there was evident a greater vegetative vigor of one sexual race over the other , the more vigorous race was always in the ...
... gametes are typically equal in size . In making the diagram , it was observed that of those species , in which there was evident a greater vegetative vigor of one sexual race over the other , the more vigorous race was always in the ...
Página 379
... gametes and their development into normal zygospores . These fundamental characteristics of plus and minus must be present also in the herma- phroditic or homothallic species since , as in- dicated at the top of Fig . 2 , such hermaphro ...
... gametes and their development into normal zygospores . These fundamental characteristics of plus and minus must be present also in the herma- phroditic or homothallic species since , as in- dicated at the top of Fig . 2 , such hermaphro ...
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Academy of Sciences acid active Advancement of Science Agriculture American Association American Chemical Society animals annual applied appointed Asso Barosaurus biological botanists botany Bureau cent chemical chemistry Chicago College committee cooperation course diecious director disease division effect elected electrons ence engineering entodermal experiments fact factors fessor field gametes Geological Survey geologist given ical Illinois important increase industry Institute interest intersexes investigation John knowledge laboratory lectures mathematical Medical School medicine meeting ment method motion Mucor Museum National Research Council nature notochord observed obtained organization papers physics physiology plant possible present president problems Professor projectile public health recently relation SCIENCE FRIDAY scientific secretary Section Society soil solar eclipse species station temperature theory tion United Univer University velocity versity Washington William William Osler Yale University York zoology zygospores
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