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

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It only takes one biological cell to create an organism. A single cell is able to keep itself functional through its 'mi..

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This tutorial investigates perception as two people can interpret the same thing differently. Know more about human perc..

Principles of Hormonal Control Systems
Principles of Hormonal Control Systems

Hormones are essential in the regulation of the activity of the various biological systems of the human body. The ineffi..

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Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..

Population Regulation in an Ecosystem
Population Regulation in an Ecosystem

With regard to the population size of a species and what factors may affect them, two factors have been defined. They ar..