Tag: darwin's theory of evolution

Lamarck is the scientist, who gave theory of acquired characteristics. He explained that animals acquire characteristics after using certain physical traits constantly.

Lamarckism is the idea that an organism can pass on characteristics that it acquired during its lifetime to its offspring. It is named after the French biologist Jean-Baptiste Lamarck.
Alexander Oparin was a Soviet biochemist notable for his untested theories about the origin of life and for his book 'The Origin of Life'.
Gregor Johann Mendel was a German-speaking Moravian scientist and Augustinian friar, who gained posthumous fame as the founder of the modern science of genetics.
Suarez is a Spanish scientist. Thus, option A is correct.

Lamarckism (or Lamarckian inheritance) 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 theory of evolution is the first theory of evolution which was followed by other theories proposed by Wallace, Darwin and Hugo de Vries. 

The inheritance of acquired characteristics is a hypothesis that physiological changes acquired over the life of an organism (such as the enlargement of a muscle through repeated use) may be transmitted to offspring. The basic concept of inheritance of acquired characters was finally widely rejected in the early 20th century. It was disapproved by experiment conducted by Weismann. Weismann conducted the experiment of removing the tails of 68 white mice, repeatedly over 5 generations and reporting that no mice were born in consequence without a tail or even with a shorter tail. 

The inheritance of acquired characteristics is a hypothesis that physiological changes acquired over the life of an organism (such as the enlargement of a muscle through repeated use) may be transmitted to offspring. It is also commonly referred to as the theory of adaptation equated with the evolutionary theory of French naturalist Jean-Baptiste Lamarck known as Lamarckism. Thus, option C is correct. Lamarckism does not reflects organisms are products of a history of descent with modification (Darwinism), the goal of evolution is to adapt organisms to the environment and evolutionary change is brought about by natural selection (Darwinism). Thus, other options are wrong.

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.

Lamarck illustrated his theory using the example of the evolution of giraffes. They had short-necked ancestors that had tried all their lives to reach for the juicy leaves of trees. By constantly stretching their necks, they grew longer and longer, a property which they passed on to their offspring. The long neck of the giraffe is said to have come into existence in this manner over generations. So, according to Lamarck intense use of an organ results in its development.