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For human species to obviate extinction, reproductive mature adults should be producing viable offspring in order to con..

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Plants are responsible for incredible feats of molecular transformation. Plant processes, such as photosynthesis, photop..

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The diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant ad..

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The circulatory system is key to the transport of vital biomolecules and nutrients throughout the body. Learn about the ..

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Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..

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Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..

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