False because they wouldnt be there if they had no function
Answer:
I wonder what tiles.
Explanation:
Seriously though complete your question before you tap done.
Answer is A. A population becomes separated by environmental factors into two groups that do not reproduce with one another.
When a population of a species become geographically separated then gene flow between them stops. Over a period of time, the population may become genetically different in response to the natural selection due to different environments. Selection and genetic drift will act differently on these two separated populations. This will results into two separate species. This type of speciation is called allopatric speciation.
B. Global climate is complex, so changes in global climate are hard to predict.
