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Define Evolution;give an example
Evolution is the process of change in the heritable characteristics of biological populations over successive generations. Evolutionary processes give rise to biodiversity at all levels of biological organisation, including the levels of species, populations, individuals, and genes.
One example of evolution is antibiotic resistance. Bacteria that are exposed to antibiotics will sometimes mutate so that the antibiotic can no longer kill them. These bacteria will then reproduce, passing on the resistance to their offspring. This is how antibiotic resistance spreads.
Factors Causing Evolution as per Lamarckism Theory
Lamarckism theory of evolution states that an organism’s characteristics can be passed down to its offspring. The main factor that causes evolution as per Lamarckism theory is the use and disuse of organs. According to Lamarckism, an organism’s characteristics can be passed down to its offspring if the organism uses or disuses its organs. For example, if an organism uses its muscles a lot, the muscles will become stronger. The offspring of the organism will then inherit the stronger muscles.
Example in Support of Lamarckism
A good example of Lamarckism in action can be found in the case of a giraffe. Giraffes have long necks because their ancestors stretch their necks to eat leaves from high trees. The stretching of the neck caused the muscles in the neck to grow larger and stronger. The next generation of giraffes inherited these stronger muscles, and so they were also able to stretch their necks to eat leaves from high trees. This process continued over many generations, until the giraffes had long necks.
Charles Darwin Theory of Evolution
Charles Darwin’s theory of evolution is the widely accepted scientific explanation for the development of life on Earth. The theory states that all life on Earth is descended from a common ancestor, and that natural selection and genetic drift are the two primary mechanisms by which organisms evolve over time.
Facts Regarding Evolution
Evolution is the process of change in the inherited traits of a population of organisms over successive generations. The theory of evolution by natural selection, first proposed by Charles Darwin in 1859, is the most widely accepted explanation for the diversity of life on Earth.
According to the theory of evolution, variation within populations arises randomly and individuals with advantageous traits are more likely to survive and reproduce. Over time, this process leads to the evolution of new species. The process of evolution is constantly occurring and has led to the diversity of life on Earth, including human beings.
