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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..
This tutorial deals with the structure and function of flowers, fruits, and seeds. Also included here are the types of f..
Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..
The hominid family diversified from the apes around 6 to 8 million years ago. Since then, the evolutionary path has prov..
This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..