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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..

The nervous system is essentially a biological information highway. This tutorial gives an overview of the nervous syste..

DNA is a double helix structure comprised of nucleotides. A nucleotide, in turn, is made up of phosphate molecule, deoxy..

Part of the genetic information is devoted to the synthesis of proteins. mRNA, a type of RNA, is produced as a transcri..

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

Homeostasis is essential to maintain conditions within the tolerable limits. Otherwise, the body will fail to function p..

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