Question

According to Darwin, evolution is_______

• A. a slow, gradual and continuous process
• B. a sudden but discontinuous process
• C. a slow and discontinuous process.
• D. a slow, sudden and discontinuous process

Answer 1

Answer: (A)

Darwin believed that evolution is a slow, gradual and continuous process which occurs due to the variations that get accumulated and are heritable. Whereas, according to de Vries, evolution is a jerky and discontinous process, de Vries believed mutation or discontinous variation is the raw material of evolution. Unlike Darwin’s continuous variations, mutation appear all of a sudden and become operational immediately.