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This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..
Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..
The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..
Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..
Learn how the way genes control and determine every aspect of the body. This lesson uses lac operon as an example. ..