EVERYDAY SCIENCE

Detailed explanation-1: -1. Perpetual change is the basic theory of evolution on which the others are based-the world is constantly changing, as documented by the fossil record that refutes Creationists’ claims. 2. Common descent-all forms of life descended from a common ancestor.

Detailed explanation-2: -Evolution: Evolution consists of changes in the heritable traits of a population of organisms as successive generations replace one another. It is populations of organisms that evolve, not individual organisms.

Detailed explanation-3: -The theory of evolution is a shortened form of the term “theory of evolution by natural selection, ” which was proposed by Charles Darwin and Alfred Russel Wallace in the nineteenth century.

Detailed explanation-4: -Gradualism in biology and geology refers most broadly to a theory that changes of organic life and of the Earth itself occur through gradual increments, and often that transitions between different states are more or less continual and slow rather than periodic and rapid.