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This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..

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This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..

Cell Biology
Cell Biology

The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..

Physical growth
Physical Development in Humans

This tutorial elaborates on the physical development of humans, particularly from puberty to adulthood. Read this tutori..

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A Balanced Vitamin Diet – Vitamins A – K

A balanced diet is essential to a healthy organism. Insufficiency or too much of a particular element or compound, such ..

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