Evolutionary theory is the premise that the inherited characteristics of all living organisms change over successive generations within each biological population. Evolution is a slow and gradual process that gives rise ... More »

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Evolution theory, developed by Charles Darwin, exchanged the concept of fixed species with the idea of evolution, made possible by the vehicle of natural selection. Evolution theory is often associated with Marxism and c... More »

Despite the fact that he refused to believe in evolution, naturalist and palaeontologist Georges Cuvier (1769-1832) contributed to Charles Darwin's theory of evolution, particularly in terms of natural selection, by esta... More »

All living organisms partake in some form of cellular respiration. This includes bacteria, fungi, protists, plants and animals. Cellular respiration is sometimes called aerobic respiration because it requires oxygen to o... More »

Biologists have developed a specific system for classifying all living organisms which is based on dividing all known organisms into groups according to common features which scientists believe are biologically significa... More »

Gregor Mendel contributed to the field of heredity by discovering that certain traits are inherited and passed along to successive generations. Mendel performed multiple studies, using sweet peas as his subjects, over a ... More »

A physiological change is a change in the normal function of a living organism. An example of a physiological change is the everyday shedding of dead skin cells in humans. More »