When should you identify root causes? 1  Whenever you are faced with addressing a challenging community problem. 2  When there is support for a solution that does not seem to get at the real causes of the problem. 3  When there is ignorance or denial of why a community problem exists.
There are two basic types of organisms based on cell type: Prokaryotic and Eukaryotic. Prokaryotic cells are divided into the domains Bacteria and Archaea. Eukaryotic cells make up the more familiar Domain Eukarya. Prokaryotes are the smallest forms of life that can live independently. Most prokaryotes are tiny single cells, but some can form larger, multi-celled structures.
The domain Eukaryota includes all organisms that have membrane-bound structures called organelles, which include the nucleus, mitochondria and chloroplasts. The most diverse group in Eukaryota is the protist kingdom. Some scientists do not think that the protists should be lumped together in one kingdom. The other two domains contain organisms that do not have organelles. These organisms are called prokaryotes and consists of bacteria.