Difference Between Darwinism and Lamarckism

Main Difference

The main difference between Darwinism and Lamarckism is that Darwinism theory is based on the idea of natural selection, whereas Lamarckism theory is founded on the concept of vital internal force which is found in all living organisms.

Darwinism vs. Lamarckism

Darwinism gives the idea that all living organisms arise and develop through the process of natural selection which increase the ability of organisms to survive, compete, and reproduce, whereas Lamarckism gives the belief that new structures produce from new desires and change habits of organisms over time. Darwinism does not disbelieve the internal vital force of Lamarckism, while Lamarckism does not agree with Darwin’s theory of Natural selection. Darwinism two major factors are a struggle for existence and survival of the fittest; on the other hand, Lamarckism does not accept these two factors. Only useful and fittest variations will be transferred over successive generations according to Darwinism; on the contrary, all acquired characteristics are inherited by the next generation and was proposed by Lamarckism. According to Darwinism, an organ can develop or degenerate further only due to continuous differences; on the flip side, according to Lamarckism, if an organ is continuously in use then it would be better developed, and if neglect of an organ happens, then it can result in its degeneration.

Comparison Chart

DarwinismLamarckism
It is a theory of life evolution and it tells that all organisms arise and develop through the process of natural selection of inherited, small variations that growth the individual’s ability to survive, compete, and reproduce.Lamarckism is also known as the inheritance of acquired characteristics which means an organism can pass on its all characteristics to its offspring that is has acquired through use or disuse during its lifetime.
Concept
Organisms arise and develop through the process of natural selection which increase the ability of organisms to survive, compete, and reproduceNew structures produce from new desires and change habits of organisms over time
Exceptions
Does not disbelieve the internal vital force of LamarckismDoes not agree with Darwin’s theory of Natural selection
Struggle for Existence & survival of the Fittest
Darwinism two major factors are a struggle for existence and survival of the fittestDoes not accept these two factors
Generations
Only useful and fittest variations will be transferred over successive generationsAll acquired characteristics are inherited by the next generation
Organs Develop/Degenerate
An organ can develop or degenerate further only due to continuous differencesIf an organ is continuously in use, then it would be better developed, and if neglect of an organ happens, then it can result in its degeneration.

What is Darwinism?

Darwinism is the theory of biological evolution and it tells that all organisms arise and develop through the process of natural selection of inherited, small variations that growth the individual’s ability to survive, compete, and reproduce and also known as Darwinian theory or Theory of natural selection. In general terms, it is a distinctive form of an explanation of evolution for the diversity of life on earth and in history. The major factors in the theory include the struggle for existence, overproduction, survival of the fittest, and origin of species.

Major Structures of Darwinism

  • Concerning several traits of species, they vary slightly from each other, which are formed by individuals.
  • At a geometric rate, species can increase their number of generations.
  • This overall tendency of species is assessed by limited resources, the principles of population, predation, and diseases that will ultimately decide the struggle for survival among members of specific species.
  • Some individuals will have some differences, providing them with a slight benefit in their struggle where individuals will let better and efficient access to greater resistance, resources, and greater achievement at avoiding predation.
  • Some of these individuals may survive better than other individuals and producing more offspring.

What is Lamarckism?

Lamarckism is also known as the inheritance of acquired characteristics which means an organism can pass on its all characteristics to its offspring that is has acquired through use or disuse during its lifetime. This theory was proposed by Jean Baptist de Lamarck who was a French biologist (1744-1829). In simpler terms, this idea suggests that there is present a vital internal force in all living organisms with special considerations of essential desires and needs to produce new structures and also change in the habit of an entire organism.

Major Concepts

  • Internal Vital Force: as a result of pre-existing internal vital force, all living things and their components are increasing in size and number.
  • Use and Disuse of Organ: If an organ is continuously in use, then it would be better developed, and if neglect of an organ happens, then it can result in its degeneration.

Key Differences

  1. Darwinism gives the idea that all living organisms arise and develop through the process of natural selection, whereas Lamarckism gives the belief that new structures produce from new desires and change habits of organisms over time.
  2. Darwinism does not disbelieve the internal vital force of Lamarckism, while Lamarckism does not agree with Darwin’s theory of Natural selection.
  3. Darwinism two major factors are a struggle for existence and survival of the fittest; on the other hand, Lamarckism does not accept these two factors.
  4. Only useful and fittest variations will be transferred over successive generations, which is according to Darwinism; on the contrary, all acquired characteristics are inherited by the next generation, and this idea was proposed by Lamarckism.
  5. According to Darwinism, an organ can develop or degenerate further only due to continuous differences; on the flip side, according to Lamarckism, if an organ is continuously in use, then it would be better developed, and if neglect of an organ happens, then it can result in its degeneration.

Conclusion

Above discussion concludes that Darwinism theory states the idea of natural selection and does not accept the idea of the internal vital force of Lamarckism, whereas Lamarckism theory is founded on the concept of internal vital force and does not accept the concept of natural selection of Darwinism.

Janet White

Janet White is a writer and blogger for Difference Wiki since 2015. She has a master's degree in science and medical journalism from Boston University. Apart from work, she enjoys exercising, reading, and spending time with her friends and family. Connect with her on Twitter @Janet__White

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