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

Geological Periods
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Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..

Gene Pool and Speciation
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According to Charles Darwin's theory of natural selection, preferable genes are favored by nature in the gene pool, and ..

Crossing Over and Genetic Diversity
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Gregor Mendel, an Austrian monk, is most famous in this field for his study of the phenotype of pea plants, including ..

Hormone Production
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Hormones are chemical messengers produced by specialized glands and they were produced by switching on the genes designe..

Chemical composition of the body
Chemical Composition of the Body

The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial..