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Crossing Over and Genetic Diversity
Crossing Over and Genetic Diversity

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

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The Evolutionary Development of Multicellular Organisms

Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..

Biological Viruses
Biological Viruses

Viruses possess both living and non-living characteristics. This unique feature distinguishes them from other organisms...

Birth of a Human Baby
Birth of a Human Baby

Following nine months inside the mother's womb is the birth of the baby. Know the different stages of the birthing proce..

running freshwater community
Running Water Freshwater Community Factors

This tutorial noted some of the physical and chemical factors that provide the framework of a running water community in..

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Stems

Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..