Guess who?

• Jean Baptiste Lamarck

  An organism changes during its life in order to adapt to its environment. These changes are passed on to its offspring.
• Thomas Malthus

  Pointed out that human populations can increase more quickly than food supplies and that populations are often limited by conditions such as war, disease, or lack of food.
• Georges Cuvier

  The idea is that sudden geologic catastrophes caused the extinction of large groups of organisms at certain points in the past.
• Carolus Linnaeus

  Developed the two-part, or binomial, format for naming species that is still used today.
• Charles Darwin

  Thought of evolution as a process in which both descent (shared ancestry, resulting in shared characteristics) and modification (the accumulation of differences) can be observed.