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Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..

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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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Following nine months inside the mother's womb is the birth of the baby. Know the different stages of the birthing proce..

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This tutorial introduces flowing water communities, which bring new and dithering factors into the equation for possible..

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Plants need to regulate water in order to stay upright and structurally stable. Find out the different evolutionary adap..

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The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..

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