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The sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over..

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This study guide tackles plant roots in greater detail. It delves into the development of plant roots, the root structur..

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Plant cells have plastids essential in photosynthesis. They also have an additional layer called cell wall on their cell..

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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 the genetic diversity in more detail. It also delineates how certain alleles are favored over..

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The blood sugar level is regulated by two hormones. The mechanism behind this type of negative feedback control is descr..