According to the Hugo De Vries mutation theory, what is the source of variation in organisms?
Environmental factors
Sexual reproduction
Spontaneous mutations
Gene flow
According to the Hugo De Vries mutation theory, new variations arise spontaneously due to mutations, which are random changes in the genetic material of an organism. These mutations can occur spontaneously or as a result of environmental factors, such as exposure to radiation or chemicals. The theory emphasizes the role of chance in the evolution of organisms, as these mutations provide the raw material for natural selection to act upon. Overall, the Hugo De Vries mutation theory suggests that mutations are the primary source of genetic variation in organisms.
Option 3 is the correct answer.