brief short note on lamarckism
Answers
Explanation:
Lamarckism (also called Lamarckian evolution) is a hypothesis regarding evolution. Evolution tries to explain how species change over time. Today, the only widely accepted theory of evolution is that developed from the ideas of Charles Darwin.
Lamarckism was developed by Jean-Baptiste de Lamarck. He based his ideas, to some extent, on those of Erasmus Darwin, the grandfather of Charles Darwin. Lamarckism says that individuals do not only pass on the things they received from their parents, but also some things they experienced during their lifetime. As an example, he cited giraffes. Giraffes, which have long necks, must have evolved from ancestors with much shorter necks. His idea was that adults needed to stretch their neck to reach leaves from high branches. Therefore, he thought, the children inherited longer necks. This idea is called the inheritance of acquired characteristics.
Although Darwin did not entirely break with these ideas, his characteristic idea of natural selection relates to the individuals's relative survival and success in reproduction. Better adapted forms leave, on average, more offspring. This changes the proportion of alleles in the population.