Question

Theory of Lamarck was based on

• A. Adaptive modifications
  
• B. Adaptive radiatons
• C. Both A and B
• D. None of the above

Answer 1

The correct option is A Adaptive modifications

Lamarckism is the idea that an organism can pass on characteristics that it acquired during its lifetime to its offspring also known as heritability of acquired characteristics or soft inheritance. It is named after the French biologist Jean-Baptiste Lamarck, who incorporated the action of soft inheritance into his evolutionary theories as a supplement to his concept of an inherent progressive tendency driving organisms continuously towards greater complexity, in parallel but separate lineages with no extinction. Lamarck did not originate the idea of soft inheritance, which proposes that individual efforts during the lifetime of the organisms were the main mechanism driving species to adaptation, as they supposedly would acquire adaptive changes and pass them on to offspring. According to Lamarck change in the environment brings modifications in plants and animals so as to adapt to their surroundings. So, theory of Lamarck was based on adaptive modifications and not based on adaptive collisions and radiations. Thus, option A is correct and other options are wrong.