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Life, as we know it today, is presumed to have started in the sea and many of them were likely eukaryotic animal-like or..

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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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Principles of Hormonal Control Systems

Hormones are essential in the regulation of the activity of the various biological systems of the human body. The ineffi..

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Human Reproduction and Fertilization

For human species to obviate extinction, reproductive mature adults should be producing viable offspring in order to con..

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Ecology & Biodiversity: New Zealand Flora & Fauna

New Zealand is known for its unique biodiversity, caused by its remarkable geography and geologic history. Breaking away..

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Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..