It is not the organs-that is, the character and form of the animal's bodily parts-that have given rise to its habits and particular structures. It is…

- Jean-Baptiste Lamarck

All known living bodies are sharply divided into two special kingdoms, based upon the essential differences which distinguish animals from plants, an…

- Jean-Baptiste Lamarck

On our planet, all objects are subject to continual and inevitable changes which arise from the essential order of things. These changes take place a…

- Jean-Baptiste Lamarck

Life, in a body whose order and state of affairs can make it manifest, is assuredly, as I have said, a real power that gives rise to numerous phenome…

- Jean-Baptiste Lamarck

All the acquisitions or losses wrought by nature on individuals, through the influence of the environment in which their race has long been placed, a…

- Jean-Baptiste Lamarck

One must believe that every living thing whatsoever must change insensibly in its organization and in its form... One must therefore never expect to …

- Jean-Baptiste Lamarck

The form follows the function.

- Jean-Baptiste Lamarck

The great age of the earth will appear greater to man when he understands the origin of living organisms and the reasons for the gradual development …

- Jean-Baptiste Lamarck

Habits form a second nature.

- Jean-Baptiste Lamarck