Request for tender. A request for tenders (RFT) is a formal, structured invitation to suppliers to submit a bid to supply products or services.
Altogether 786 isolates from time interval 2008-2010 were grouped into 90 PCR ribotypes and eleven of them were shared among all host types and the environment. Ribotypes that were most common in humans were also present in water and different animals (014/020, 002, 029). Interestingly, non-toxigenic isolates were very common in the environment (30.8%) in comparison to humans (6.5%) and animals (7.7%). A high degree of similarity was observed for human and animal isolates with PFGE.
Classifying different environments: ecosystems and biomes. One way to group together areas that share characteristics is to look at the ecosystem of the area. An ecosystem is a group of living organisms interacting with the non-living parts of an environment.he harsh conditions of an extreme environment mean that only plants and animal species that have adapted are able to survive in the area. The vegetation, climate and soils are closely linked with one another. A large ecosystem is called a biome.