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.
<u>What is ischemia?</u>
It can affect your heart, your intestines, and any part of your body. If this happens it can end up triggering a sequence that leads to your death.
<u>Ischemia is.. </u>
an inadequate supply of oxygenated blood to all or part of a tissue or organ as a result of an obstructed or constricted blood vessel.
<u>Not sure what you mean by "Coronary infraction?", but</u>
The word "infarction" comes from the Latin "infarcire" meaning "to plug up or cram."
This should have been more points but I’m not really good with bones