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).
The above criteria work nicely for evaluating scholarly periodical articles. However, when choosing newspaper or popular magazine articles, you often will not find an author listed, and seldom will find any references to sources of information. When evaluating articles that are not scholarly, you need to be more critical of the content of the article.