Teacher educators have a very daunting task requiring currency in their discipline, curricular, policy and institutional imperatives as well as pedagogical and cultural issues. Tertiary institutions are facing increasing expectations to cater for and increase retention of underrepresented groups, whilst class sizes increase and face-to-face contact decreases. This paper outlines a case study of...

Two small, isolated Pacific islands colonized by Polynesians experienced quite different fates—Easter Island suffered a major ecological collapse, while Tikopia appears to have attained sustainability. Both events occurred before European contact and provide valuable evidence in the discussion of sustainability ethics.

1. Hypertrophy of the islands of Langerhans occurs in two forms: (1) the simple type which is nothing more than an increase in size of preexisting islands; and (2) the columnar type, in which the islands are composed of anastomosing columns of cylindrical cells. 2. Regeneration of the islands of Langerhans takes place by means of a budding off of columnar cells from the ducts. The process is an...

The compositions of bacterial genomes can be changed rapidly and dramatically through a variety of processes including horizontal gene transfer. This form of change is key to bacterial evolution, as it leads to ‘evolution in quantum leaps’. Horizontal gene transfer entails the incorporation of genetic elements transferred from another organism—perhaps in an earlier generation—directly into the ...

Pathogenicity islands represent distinct genetic elements encoding virulence factors of pathogenic bacteria. Pathogenicity islands belong to the class of genomic islands, which are common genetic elements sharing a set of unifying features. Genomic islands have been acquired by horizontal gene transfer. In recent years many different genomic islands have been discovered in a variety of pathogen...

Heterostyly has been considered rare or absent on oceanic islands. However, there has been no comprehensive review on this issue. Is heterostyly truly rare on oceanic islands? What makes heterostyly rare on such islands? To answer these questions, we review the reproductive studies on heterostyly on oceanic islands, with special emphasis on the heterostylous genus Psychotria in the Pacific Ocea...

In the past decade, the investment in fisheries development has grown remarkably in the Persian Gulf region. A 1800 km of northern coastline of the Persian Gulf, the Oman Sea and more than 14 islands belong to Iran have provided great possibilities of economic activities. In-shore marine islands such as Kish, Farour, Hendurabi, Tonb made a good opportunity for fishing and harvesting of ornament...