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Plants produce hormones to regulate their growth. Auxins, for instance, influence plant growth. Know the role of auxin i..

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This tutorial looks at the relationship between organisms. It also explores how energy is passed on in the food chain an..

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Meet the colorful takahē, an extremely rare flightless bird. Find out more about its unique features and why they matte..

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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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IQ, Creativity and Learning

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Still Water Animals

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