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Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..

Biological Energy
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ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..

Darwin's Finches - Natural Selection
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This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..

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Nutrients in the soil are essential to the proper growth of a land plant. This tutorial deals with the properties of soi..

Regulation of Biological Systems
Regulation of Biological Systems

Regulation of Biological Systems tutorials are focused on the modulation of biological systems from cell to population l..

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Circulation

The circulatory system is key to the transport of vital biomolecules and nutrients throughout the body. Learn about the ..