Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..
The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..
Plants are characterized by having alternation of generations in their life cycles. This tutorial is a review of plant m..
A balanced diet is essential to a healthy organism. Insufficiency or too much of a particular element or compound, such ..
The diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant ad..
Lymphocytes are a type of white blood cell capable of producing a specific immune response to unique antigens. In thi..