Mention two principles through which Lamarck explain his ideas

Dear Student, Lamarck uses two idea - 1. New needs-Diversity of organism is due to adaptability to its environment. 2. Use and disuse of organ- Organ which is more in use will gradually strengthen as compared to those which are not in use. 3. Inheritance of acquired character- According to lamarck, any trait acquired by an organism will be passed on to its next generation. Regards