Answer: the first answer is correct.
Explanation:
It means a continental drift occurred
There has to be one side with a high concentration and another side with a lower concentration
True. With time, effort, and the right tools, anything can be replicated.
Mountain lions with lots of variation because variation is important for species’ survival. If there is an environmental change that negatively affects organisms with a certain trait, variation can insure that the entire species will not be wiped out because some organisms within that species might not have that trait and can survive.
