The evolutionary history of a set of taxa is usually represented by a phylogenetic tree, and this model has greatly facilitated the discussion and testing of hypotheses. However, it is well known that more complex evolutionary scenarios are poorly described by such models. Further, even when

A tandem repeat in DNA is two or more contiguous, approximate copies of a pattern of nucleotides. Tandem repeats have been shown to cause human disease, may play a variety of regulatory and evolutionary roles and are important laboratory and analytic tools. Extensive knowledge about pattern size

bias in bargaining may indeed be evolutionary viable. When the inherent toughness of the bargainer is observed by the opponent, this opponent will adjust his behavior accordingly, in a way which may enhance the actual payoff of the biased bargainer. Suppose, then, that a population consists initially

In this experiment we have simulated the predator- prey relationship using a computer simulation software called NetLogo 3.1.4 and studied some aspects of prey evolution. If looked upon naively, predation seems to only have a detrimental effect on the prey popula-tion. It’s true that predation leads to decline in prey population size, but predation plays an

Communication is of great importance in cells: it is matter of survival. Cells communicate each other in many ways. Inside the cell the information proceeds through the form of signal transduction pathways. We consider a possible role of the nucleus in the regulation of the flow of information

recognition that technological advance must be understood as an evolutionary process, and recognition that the institutions involved in that process include much more than the simple market institutions on which economists usually focus. Then I turn to the contemporary policy arena that is the focus

This paper explores the role of art in socio-cultural evolution. The first section presents a brief overview of the development of Western art and its relation to the evolution of Western civilization. The two main perspectives on art are reviewed: functional art vs. art for art’s sake. The second

Humans are the only animals who can deliberately plan for future needs. Our ability to have a "theory of mind" is also a factor that facilitates advanced forms of cooperation and communication. The main thesis of this article is that symbolic communication evolved in order to make cooperation about future goals possible.

Abstract — Most recently published complete bacterial genomes have revealed unexpectedly high numbers of long strict repeats. In this article we discuss the various functional and evolutionary roles of these repeats, focusing in particular on their role in terms of genome stability, gene transfer

accumulation and their fatty acids composition among species differing in habit, habitat and relatedness. We review some relevant hypotheses about the evolutionary role of seed oils and their influence on plant fitness, using as case study the, apparently, inconsistent fatty acid profile of the tropical