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).
TO FIND AN ARTICLE, USE PERIODICAL DATABASES. When you don't have the citation to a specific article, but you do want to find articles on a subject, by a specific author or authors, or with a known article title, you need to use one or more periodical databases.