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Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..
The hominid family diversified from the apes around 6 to 8 million years ago. Since then, the evolutionary path has prov..
Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..
Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..