Nanometer

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

Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..

Organisms employ different strategies to boost its defenses against antigens. Humans have an immune system to combat pat..

This tutorial investigates perception as two people can interpret the same thing differently. Know more about human perc..

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

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

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