Evolution Vs Natural Selection Essay

Evolution is the central idea that all life on Earth shares a common ancestor. The theory of evolution was essentially created by Charles Darwin, a naturalist, who traveled the world by ship, collecting and documenting plants and animals. Darwin’s theories have changed the way scientists see life. Evolution can be deemed as true, due to the evidence that exists to support it, such as ideas of natural selection, structures of fossils, and variations of DNA molecules.

Natural selection, also known as common descent, is an objective force of nature, and can be described as the driving force of evolution. Although difficult to understand, natural selection strongly supports the theory of evolution. It is important to distinguish the difference between descent with modification and common descent when talking about natural selection. Parents produce offspring similar but not exact to them, through descent. Offspring carry genes from their parents, but sometimes can have random genetic variations, which modifies or creates new traits in their genes. Common descent explains how natural selection is capable of producing new traits by nature. Evolution produces changes over time, whether is is between two generations or multiple. Traits are either positive or negative, which helps to determine an organism’s fitness. A fitness of an organism describes its success at reproducing based off of factors such as its ability to survive, find a mate, produce offspring, and to leave its genes into the next generation. For example, brown beetles may leave more offspring than green beetles, so they have a higher fitness. Then, green

Evolution explains life’s unity and diversity. Evolution can be deemed as true due to the ideas and evidence that exists to support it including ideas of natural selection, fossil records, and genetic