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Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..

Life, as we know it today, is presumed to have started in the sea and many of them were likely eukaryotic animal-like or..

Freshwater ecology focuses on the relations of aquatic organisms to their freshwater habitats. There are two forms of co..

This lesson looks at population attributes, regulation, and growth. It also covers population genetics, particularly gen..

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

If the balance of nature is left untouched, landscapes can change dramatically over time. A previous ecosystem is supers..

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