AP BIOLOGY

Detailed explanation-1: -Lamarckism was proposed by Jean-Baptiste de Monet Lamarck in the year 1744-1829. This theory was based on the principle that all the physical changes occurring in an individual during its lifetime are inherited by its offspring. For eg., the development of an organ when used many times.

Detailed explanation-2: -work of Lamarck He enunciated the law of use and disuse, which states that when certain organs become specially developed as a result of some environmental need, then that state of development is hereditary and can be passed on to progeny.

Detailed explanation-3: -Lamarck is best known for his Theory of Inheritance of Acquired Characteristics, first presented in 1801 (Darwin’s first book dealing with natural selection was published in 1859): If an organism changes during life in order to adapt to its environment, those changes are passed on to its offspring.

Detailed explanation-4: -Lamarckism, a theory of evolution based on the principle that physical changes in organisms during their lifetime-such as greater development of an organ or a part through increased use-could be transmitted to their offspring.

Detailed explanation-5: -Lamarck proposed that when an organ was not used, it slowly, and very gradually atrophied. In time, over the course of many generations, it would gradually disappear as it was inherited in its modified form in each successive generation.