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DNA is a double helix structure comprised of nucleotides. A nucleotide, in turn, is made up of phosphate molecule, deoxy..

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

Still Water Animals
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Animals living in aquatic habitats have diversified and evolved through time. They eventually occupy ecological niches a..

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Plant organs are comprised of tissues working together for a common function. The different types of plant tissues are m..

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The Human Physiology

Physiology is the study of how living organisms function. Thus, human physiology deals specifically with the physiologic..

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Early Mammals on Earth

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