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Animals living in aquatic habitats have diversified and evolved through time. They eventually occupy ecological niches a..

The diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant ad..

In plants, growth occurs in meristems, which are the site of repeated cell division of unspecialized cells. These cells ..

With regard to the population size of a species and what factors may affect them, two factors have been defined. They ar..

This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..

While learning and intelligence are associated with the functions of a conscious mind, sleep and dreams are activities o..

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