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Meet some of New Zealand's unique fauna, including endemic insects, frogs, reptiles, birds, and mammals, and investigate..

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The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..

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Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..

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Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of ..

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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..