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

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If New Zealand has lots of unique animals, it's also got a whole lot of unique plants. Find out more about some of them,..

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Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..

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This tutorial is a continuation of the first lesson on chromosomal mutation. Here, find out the chromosomal aberrations ..

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This tutorial noted some of the physical and chemical factors that provide the framework of a running water community in..