Best Databases for Biology
Web of Science -- Covers the top journals in all subject areas and is the largest database for scholarly research on plants and animals.
PubMed -- Largest database on human biology, medicine & health, molecular and genetic biology.
JSTOR -- The collection on JSTOR has dozens of journals in biology, covering the period from when the journals started. JSTOR is good for historical as well as current information.
Specialized Subject-specific Databases
PsycInfo -- Indexes the scholarly research in Psychology, including biopsychology and neuropsychology.
GreenFile -- A database for environmental studies research.
National Agricultural Library -- From the U.S. National Agricultural Library, this database provides citations to the agricultural literature from journals, books and technical reports. NOTE: There are no 
(Find It) buttons in NAL catalog, so you have to place individual requests for items in your Tipasa ILL account.
Organic Eprints -- An international open access archive for papers related to research in organic agriculture.