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

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

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This tutorial introduces flowing water communities, which bring new and dithering factors into the equation for possible..

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The Water Cycle

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

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Sugar Homeostasis

The blood sugar level is regulated by two hormones. The mechanism behind this type of negative feedback control is descr..

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Lotic communities have conditions that are rather harsh for typical plants. Thus, the diversity of plant species in loti..