According to Simpson, protists can be photosynthetic or heterotrophs (organisms that seek outside sources of food in the form of organic material). In turn, heterotrophic protists fall into two categories: phagotrophs and osmotrophs.
Questions asked by the same visitor. The most widely used index for magazine articles is the. Weegy: The Article Index User: The most widely used index for magazine articles is the Periodical Reference GuideReaders' Guide to MagazinesReaders' Guide to Periodical Literature. Weegy: Answer is Readers' Guide to Periodical Literature (More).
Have you noticed that references in most recently published journal articles end with a string of numbers and letters? That odd-looking item is the articleâs digital object identifier (DOI), and it may just be the most important part of the reference.eveloped by a group of international publishers, the DOI System provides a way to guarantee that digital copies of articles can remain accessible even if a journal changes its domain name or ceases publishing.