This tutorial describes the different types and causes of brain damage. Find out how genetics, physical injury, lack of ..
The movement of molecules (specifically, water and solutes) is vital to the understanding of plant processes. This tuto..
Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..
Plants in lentic habitats have features not found in terrestrial plants. They acquired these features as they adapt to t..
Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..