Use the Library Catalog to search for a specific journal article from its citation. The most useful way to search is to search for the title of the article in quotes. You can also search for a specific journal in the Library's eJournal Search.
You can find articles on biology topics and interdisciplinary science topics in several of these databases. Many of these databases have search tools that are specific to biology or other science subjects. You can request items that the library does not have access to through Interlibrary Loan at this link.
Most of the databases on this page contain scholarly sources - articles that are written for biology researchers by biology researchers. Popular science articles are written by reporters for a general audience. Here are some places to find popular science articles.