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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..
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For human species to obviate extinction, reproductive mature adults should be producing viable offspring in order to con..
This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..
Bryophytes (nonvascular plants) are a plant group characterized by lacking vascular tissues. They include the mosses, th..