1.jean baptist mamark was the first person to propose the theory of evolution
2.he proposed that the acquired characters are passed to its offspring i.e., to next generation
3.this is known as inheritence of acquired characters
4.for example elongation of neck and forelimbs in giraffe
5.even though this theory was disproved,his contribution to biology was appreciable because it changed the belief of people of olden days that the organisms on the earth have not undergone any change

2 4 2