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Independent Assortment and Crossing Over

This tutorial describes the independent assortment of chromosomes and crossing over as important events in meiosis. Read..

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Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..

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This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..

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This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..

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Lotic Communities & Algae

Lotic communities have conditions that are rather harsh for typical plants. Thus, the diversity of plant species in loti..

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In plants, growth occurs in meristems, which are the site of repeated cell division of unspecialized cells. These cells ..