somnambulism
发表于 2025-3-28 17:59:58
Book 1974ed in this volume. The first, on the more general topic of Genetic Analysis of Speciation Mechanisms, includes four papers on speciation in various groups of Diptera and Orthopteroid insects. The second symposium was devoted to the topic of Evolution in the Hawaiian Drosophilidae; it deals with the
谆谆教诲
发表于 2025-3-28 22:32:11
are included in this volume. The first, on the more general topic of Genetic Analysis of Speciation Mechanisms, includes four papers on speciation in various groups of Diptera and Orthopteroid insects. The second symposium was devoted to the topic of Evolution in the Hawaiian Drosophilidae; it deals
Trochlea
发表于 2025-3-29 01:25:59
,Übergangsformen und Umdrehungskörper,64. Use of the term host race itself has created problems as it has been applied to taxons ranging from sibling species to biotypes. I will limit it to an infraspecific category generally applied to populations of a parasitic species which exhibit distinct genetically-based preferences for certain host plants.
远足
发表于 2025-3-29 03:59:31
Dieter J. G. Schneider,Susanne Wahnerndicated that some of them must have existed in the balanced state in populations for a considerable number of generations. How long this has been in the geological sense, however, is not clear, although in some cases, attempts at an estimate have been made (e.g. Mayr 1945; Stebbins 1945).