The arthropods display a wide range of morphological diversity, varying tagmosis, as well as other aspects of the body plan, such as appendage and cuticular morphology. Here we review the roles of developmental regulatory genes in the evolution of arthropod morphology, with an emphasis on what is known from morphologically diverse species. Examination of tagmatic evolution reveals that these ch...

socialization is one of the most important goals of any developmental program and educational scientists try to provide students with appropriate contexts to develop socialization throughout the developmental ages. this study aimed to investigate the effect of traditional and modern childish plays on the social development of female students in the first grade (6-7 years old) in 1388-1389 in tw...

Bilaterian animal body plan origins are not solely about adult forms. Most animals have larvae with body plans, ontogenies and ecologies distinct from adults. There are two primary hypotheses for larval origins. The first hypothesis suggests that the first animals were small pelagic forms similar to modern larvae, with adult bilaterian body plans evolved subsequently. The second hypothesis sugg...

Many employer-provided pensions plans explicitly account for Social Security in their benefit formulas-a practice known as integration. Because integrated pensions are directly linked to Social Security, both the incidence and design of explicitly integrated plans are likely to be affected by changes in the current Social Security program. While integration has been mentioned as an important is...

the subject of the research is to understand and study the social and cotextual backgrounds of participation in a developmental experience, that is, the process of supplying pipedwater from 6 klms away to zilan village in javanrood township. this study is run using qualitative methods, deep interview teqniques and observations and it is analyzed through ground theory. if a plannable action and ...

CONTENTS Introduction 85 Brief overview of Cambrian radiation of bilateral animals 86 Rapid diversification of animal phyla 86 Characteristic body plan of each phylum 86 Early establishment of body plan 87 Altered expression of embryonic genes resulting in new body plans 87 Silurian–Devonian radiation of land plants 88 Did early land plants diverge in a rapid evolutionary radiation? 88 Are the ...