Answer:
B
Explanation:
An undifferentiated cell is such as that in a blastocyte. They are multipotent and can differentiate into any type of cells. The cells of the mass begin to have their gene differentially expressed (due to differential silencing of particular genes) hence the cell become determined. They become well organized into tissue such as skin and other organs.
An area of land or water set aside for the protection of an ecosystem is preserve
Answer: 22 days, after 3 full weeks
Explanation:
The cell nucleus, could be up there as the nuclei
