Question

which theories explained by lamark​

Answer 1

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.

Answer 2

there are two theories explain by lamarck

first theory is used and disused of organs

second theory is inheritance due to acquired characteristics