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This tutorial digs into the past to investigate the origins of life. The section is split into geological periods in the..
Lentic or still water communities can vary greatly in appearance -- from a small temporary puddle to a large lake. The s..
Learn how the way genes control and determine every aspect of the body. This lesson uses lac operon as an example. ..
Following nine months inside the mother's womb is the birth of the baby. Know the different stages of the birthing proce..
This lesson is about the methods used for ecological research, such as quadrat and transect sampling, canopy fogging, an..