Theodosius Dobzhansky discovered that successful species tend to have a wide variety of genes that do not appear to be useful to the species in
its present environment. What did this discovery help explain about
genetics and the changes that occur in a species over time?

A. Environments with more organisms tend to have more
successful species.

B. Species with greater genetic diversity adapt more easily to
changing environments.

C. Changing environments prevent species from adapting and
surviving.

D. Species in a stable environment are more resistant to a
changing environment.