Two populations of fruit flies live in the same California valley. One population of flies lays eggs in California poppies that bloom in May while the other population breeds on purple asters that bloom in August. What type of reproductive isolation would you say is at work here?

You want to cultivate some exotic plants at your farm. however, the climate is chillier than the temperature range favorable to the crop. which is the best method to use for the cultivation of this exotic crop? a. use a crop rotation method b. use a lot of fertilizer c. prepare the seed bed properly d. use a greenhouse e. use irrigation