In the 1930s, how did dobzhansky and mayr explain the origin of species?

In 1930s, Mayr and Dobzhansky illustrated the origin of species on the basis of allopatric speciation.

Explanation:

Allopatric speciation also called geographic speciation. This speciation takes place when the populations of the identical kind of species get separated because of the environmental modifications like the building of a mountain, and others. There are four kinds of speciation known that is, sympatric, artificial, peripatric, and parapatric.

age range would be the answer

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.