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.
The sodium – potassium pump is involved in establishing the resting membrane potential true or false
ANSWER: TRUE
The answer would be that the e<span>xcretion and the </span>liver<span>. Excretion in mammals. Excretion is the removal of potentially harmful or toxic substances from the </span>body<span>. These substances are usually waste materials </span>produced by<span> complex chemical reactions taking place in living </span>cells<span>. Enzymes catalyse the reactions.</span>
