ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] Records of B. betularia in Britain indicate that the incidence of the melanic form in industrial regions increased swiftly during the past 100 yr, but precise data on the rate of change are regrettably lacking1. In Manchester the black form was prevalent by 1900, although typicals still occurred. ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/2271155a0
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