The problem of research is very current for several reasons. Namely, the dominant approach on the basis of which are based all have developed and established theories of European integration, developing modern theories of international relations is a realistic basis. Neo-functionalism, inter-guvernmentalism, neo-liberalism, institutionalism (in most of its variants) as the most developed branches of the theory of European integration, despite differences in their settings to keep the basic premise that states are rational, unitary actors, whose interest stems from the assessment of their position in the system of states. For our study caused a special interest model of constructivism using Habermas theory of communicative action according to which entities in mutual interaction is open to other arguments and their validity appreciate having regard to the outgoing reasons and norms on which they are based, thereby seeking consensus as a common goal. Apply to the European Union, this approach allows European institutions were perceived as a place of discussion to reach consensus on solving common problems, rather than just the arena for bargaining. Functional adaptation to the numerous petitions which sets the European Union, requires thorough and integrated activities in the economic, institutional, administrative and legislative spheres. This process should be understood as a continuous, painstaking and long process, not a single radical surgery. Republic of Macedonia, as countries aspiring for membership in the European family must meet the political and economic criteria and to adapt political institutions in the country with those of the European Union and their needs and requirements. The aim of this paper is to perceive the key features and trends in the politics of enlargement and to make a comparison between the policy of expansion applied in the process of accession Central and Eastern Europe and the policy of expansion in the process of stabilization and association, with special emphasis on the Republic of Macedonia. Of course, previously been necessary to develop theoretical and practical approach to the concept of policy integration, development and its major elements and modalities.
Enlarged lantern size in similar-sized, sympatric, sibling species of Strongylocentrotid sea urchins: from phenotypic accommodation to functional adaptation for durophagy