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Digitale Medien

Melanism in the Lepidoptera and its Possible Induction (1923)

GARRETT, F. C. ; HARRISON, J. W. HESLOP

[s.l.] : Nature Publishing Group

Nature 112 (1923), S. 240-241

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] BELIEVING that light can be thrown on some of the problems of evolution by an experimental investigation of the development of melanism in lepidoptera, we have been studying the influence of the food plants growing in critical areas, and also of inorganic substances likely to occur in or on the ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/112240c0

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Digitale Medien

Interspecific Sterility (1922)

HARRISON, J. W. H.

[s.l.] : Nature Publishing Group

Nature 110 (1922), S. 312-312

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] Dr. Gates, in his letter which appears in NATURE for August 5, p. 179, emphasises the importance of tetraploid species in evolution, and with this position I heartily agree. Nevertheless, I do not think that the difficulties in the way of free crossings amongst diploid, tetraploid, and ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/110312a0

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Digitale Medien

Divided Composite Eyes (1923)

HARRISON, J. W. HESLOP

[s.l.] : Nature Publishing Group

Nature 111 (1923), S. 81-81

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] IT would appear from Mr. Mallock's letter (NATURE, December 9) that our knowledge of the Aleyrodidæ or “White Flies” is not so exact as it might be. This, however, takes too pessimistic a view of the situation. Whilst, undoubtedly, much remains to be done, even with some of the British species, ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/111081b0

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