Theory of Evolution: Lamarck vs. Darwin PDF

THEORY OF EVOLUTION Lamarck vs Darwin HISTORY OF EVOLUTIONARY THOUGHT Theories Before Lamarck vs Darwin's Theories  CATASTROPHISM 01 states that the earth and geological events had formed suddenly, as a result of some great catastrophe...

THEORY OF EVOLUTION Lamarck vs Darwin HISTORY OF EVOLUTIONARY THOUGHT Theories Before Lamarck vs Darwin's Theories  CATASTROPHISM 01 states that the earth and geological events had formed suddenly, as a result of some great catastrophe GEORGES CUVIER (1769–1832)  UNIFORMITARIANISM 01 Idea that the Earth has always changed in uniform ways and that the present is the key to the past JAMES HUTTON (1726-1797) THEORY OF EVOLUTION Lamarck vs Darwin  LAMARCK'S THEORY OF EVOLUTION "LAMARCKISM" 1809 01 French biologist who developed one of the first theories on how species changed. JEAN-BAPTISTE LAMARCK (1744-1829) LAMARCK'S THEORIES OF EVOLUTION Theory of NEED Theory of Theory of ACQUIRED USE AND DISUSE CHARACTERISTICS  LAMARCK'S THEORY OF EVOLUTION LAMARCK'S GIRRAFE THEORY OF NEED Organisms change because they NEED to ADAPT to their environment. THEORY OF NEED  LAMARCK'S THEORY OF EVOLUTION THEORY OF USE AND DISUSE Organisms develop specialized characteristics by the use and disuse of organs  LAMARCK'S THEORY OF EVOLUTION THEORY OF ACQUIRED CHARACTERISTICS If a parent acquires a body structure during its lifetime, it could pass on that characteristic structure to its offspring DISAPPROVING LAMARCK'S THEORY OF EVOLUTION  WHO IS CHARLES DARWIN? 01 02 Proposed an His theory of entirely different evolution by natural mechanism to selection became the account for the foundation of modern evolution of evolutionary studies species CHARLES DARWIN (1809 - 1882) THE ORIGIN OF SPECIES (1859) Here, Darwin presented his theory of evolution based on natural selection. NATURAL SELECTION Individuals within a population with the most favorable traits for an environment survive and pass on those traits SURVIVAL OF THE FITTEST!  SPECIES OVERPRODUCTION Organisms tend to over reproduce  COMPETITION There is a struggle of existence and the survival of the fittest. Living space and food are limited.  VARIATION No two individuals are the same Plants and animals of the same species differ in size, strength and adaptive structures  ADAPTATION It is a process of becoming better suited to the environment. NATURAL SELECTION Environment selects organisms that survived to be the parents of succeeding generations.  SPECIATION Favorable adaptations gradually accumulate in the species and unfavorable ones disappear. LAMARCK'S THEORY CHARLES' THEORY END