Hemiseptum

Hemiseptum a lateral half of any septum...

The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..

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

Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..

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

Lentic or still water communities can vary greatly in appearance -- from a small temporary puddle to a large lake. The s..

This tutorial digs into the past to investigate the origins of life. The section is split into geological periods in the..

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