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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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While learning and intelligence are associated with the functions of a conscious mind, sleep and dreams are activities o..

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Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..

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Pollution in Freshwater Ecosystems

There are many environmental factors that arise due to the usage of water in one way or another and for every action tha..

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Plant Water Regulation

Plants need to regulate water in order to stay upright and structurally stable. Find out the different evolutionary adap..

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A Balanced Diet – Carbohydrates and Fat

Apart from vitamins, the human body also requires high energy sources such as carbohydrates and fats. If you want an ove..