CHAM, Switzerland, May 20 -- Biology Bulletin, a journal that says it focuses on studies of cell biology, biochemistry, zoology, botany, physiology and ecology, published research articles on the following topics in its Vol. 50, No. 2 edition:

* Food Composition of a Breeding Population of the Green Toad, Bufotes sitibundus (Pallas, 1771) (Anura: Bufonidae), from Iran

* Parallelism in Speciation and Intraspecific Diversification of the Plague Microbe Yersinia pestis