The lactase-persistence mutations are roughly as old as the oldest milk-holding vessels or pots
lactase persistence:
Lactase persistence is an example of natural selection, which can cause some humans to continue the activity of the lactase enzyme in adulthood also.
The hereditary examinations and studies propose that the established mutation related to lactase persistence began a long time back, in populaces that started domesticating and dairy cultivation during the Neolithic age when pastoralist populaces started to utilize milk for their livelihood. As found and studied that “the lactase-persistence mutations are roughly as old as the oldest milk-holding vessels.” The cultural and social activities of dairying and drinking non-human milk gave an environment wherein lactase persistence was favorable. DNA proof demonstrates that mutation in the lactase gene emerged in these populaces around a similar time.
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Answer:
The cell membrane (also called the phospholipid bilayer or the plasma membrane) is one of the most important structures a cell has. If you think of the cell as a really popular nightclub, the membrane is the bouncer. It decides what enters and exits the cell.
Answer:
Option (B).
Explanation:
Liver is an important organ that regulates the metabolic pathway of the body and helps in the process of digestion. The improper functioning of liver can cause yellowish skin, edema and high blood pressure.
Mrs F medical condition clearly describes the improper functioning of liver. The liver helps in the formation of bile juice. Bile is a soapy compound that helps in the emulsification of lipids.
Thus, the correct answer is option (B).
