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This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..
Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..
This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..
Animals living in aquatic habitats have diversified and evolved through time. They eventually occupy ecological niches a..
Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of ..