Vitamin b12 is the most popular deficiency at the moment- B12 creates red blood cells which travels oxygen around the body- having B12 deficiency can lead to anaemia.
The majority of B-vitamin deficiencies in today's world can be associated with consuming alcohol and cooking
<u>Explanation:</u>
Vitamin B is most essential to be consumed for the metabolic processes and they are very delicate. Over cooking easily takes away the Vitamin-B from the food. Alcohol when consumed takes away all the vitamin-B from the kidney.
Hence majority of B-vitamin deficiency is caused by consuming alcohol and over cooking. It is important to have a food that is rich in vitamins and normally Vitamin-B is used for cell health and keep our body energetic.
This is allopatric speciation. The organisms were separated from each other by the containers. The separation caused them to evolve to the point that they were more likely to mate with each other than with a member of another tank.