Synthesis and Scope of the Role of Postmating Prezygotic Isolation in Speciation.

How barriers to gene flow arise and are maintained are key questions in evolutionary biology. Speciation research has mainly focused on barriers that occur either before mating or after zygote formation. In comparison, postmating prezygotic (PMPZ) isolation-a barrier that acts after gamete release but before zygote formation-is less frequently investigated but may hold a unique role in generating biodiversity.

Toward a Data-based Approach to the Selection of Applied Behavior Analysis Program Characteristics.

There is a paucity of data that describe how program characteristics relate to program outcome goals. This gap limits the use of data to guide and support decisions concerning the selection of applied behavior analysis (ABA) program characteristics. Therefore, the purpose of the present study was to describe a methodology for the evaluation of the relationships between program characteristics and program outcome goals in the context of identifying the ideal program characteristics to propose for a new master of science in ABA program at Franciscan Missionaries of Our Lady University (FranU).

The life history of sperm involves molecular continuity between male and female reproductive tracts.

SignificanceIn species with internal fertilization, sperm spend an important part of their lives within the female. To examine the life history of the sperm during this time, we used semiquantitative proteomics and sex-specific isotopic labeling in fruit flies to determine the extent of molecular continuity between male and female reproductive tracts and provide a global catalog of sperm-associated proteins. Multiple seminal fluid proteins and female proteins associate with sperm immediately after mating.