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 Impact Factor (IF) is a measure of the frequency with which the average article in a journal has been cited in a specific year. It is used to measure the importance or rank of a journal by calculating the times its articles are cited. The Impact Factor is considered the number one ranking value for scientific journals.