4 is the correct answer hope you get it right!!!
Answer:
Basal stem cells for keratinocytes
Explanation:
Keratinocytes are epidermal cells located in the outermost layer of the skin (i.e., the epidermis). Moreover, the cells located in the basal layer of the skin are known as basal keratinocytes or basal cells. These basal cells are proliferative cells that undergo differentiation in order to form suprabasal epidermal layers. Merkel cells are neuroendocrine cells that are located in the basal layer of the skin (scattered among basal keratinocytes), which are attached to surrounding keratinocytes by intercellular junctions called desmosomes.
The DNA can become a double strand again.
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I believe that during the second and third trimesters of pregnancy, the woman's energy needs increases by 350 to 450 kilocalories per day. Energy needs during pregnancy are no higher than the Estimated requirement for non pregnant women until the second trimester, there after energy need per day is 340 kcal and 452 kcal in the second and third trimesters, respectively.