What is the Difference Between Natural Selection and Artificial Selection?

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Natural selection and artificial selection are both processes that involve the selection of desirable traits in organisms, but they differ in the agents responsible for the selection and the environments in which they occur. Here are the key differences between the two:

  1. Agent of selection: Natural selection is a process where organisms adapt to their environment for survival, while artificial selection is a man-made process imposed by external entities, usually humans, to enhance the frequency of desirable features.
  2. Environment: Natural selection occurs in natural populations, while artificial selection occurs in reared or domestic populations.
  3. Speed: Natural selection is a slow process, whereas artificial selection is a rapid process.
  4. Result: Natural selection helps in the inheritance of only favorable characters to successive generations, while artificial selection helps in the inheritance of a variety of desired selected traits to successive generations.
  5. Examples: Examples of natural selection include the selection of long-necked giraffes, as their long necks allow them to reach leaves higher up in trees, giving them a competitive advantage. Examples of artificial selection include the breeding of different varieties of dogs or cattle to produce desired varieties.

In summary, natural selection is a gradual process driven by the environment and the organism's ability to adapt, while artificial selection is a controlled, rapid process imposed by humans to achieve specific, desired traits in organisms.

Comparative Table: Natural Selection vs Artificial Selection

Here is a table comparing natural selection and artificial selection:

Aspect Natural Selection Artificial Selection
Definition A process where organisms adapt to their environment for survival. A man-made process in which plants or animals are bred for specific characteristics.
Occurrence Occurs in natural populations. Occurs in reared or domestic populations.
Speed Slow process. Rapid process.
Driven By Environmental factors. Human choice.
Inheritance Favorable traits inherited over successive generations. Selected desirable traits inherited over successive generations.
Diversity Results in biological diversity. May not always increase species' chance for survival in its natural environment.
Affects Entire population of a species. Selected individuals.
Examples Selection of long-necked giraffes. Breeding of different varieties of dogs or cattle to produce desired varieties.

In summary, natural selection is a process driven by environmental factors, where organisms adapt to their surroundings for survival. Artificial selection, on the other hand, is a man-made process guided by human choice to breed plants or animals for specific traits.