Which of the following is not a way that two populations of the same species can be geographically isolated?
(a) newly formed mountain ranges
(b) glaciers
(c) lava flows
(d) individuals in one population mate during a different month than individuals in another population.

In an effort to japan recover from the devastating effects of the 1929 depression, japanese military leaders in the 1930s formed an alliance with nazi germany negotiated more trade treaties with the soviet union closed its doors to western trade adopted a policy of imperialist expansion