Which statement is true? A cell that divides is called a parent cell and the two new cells are daughter cells. One daughter cell and one son cell are produced from each parent cell. Two daughter cells combine to create a parent cell. A cell that divides is called a parent cell and the two new cells are a daughter cell and a son cell.

a. a cell that divides is called a parent cell and the two new cells are daughter cells.

Explanation:

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A) a cell that divides is called a parent cell and the two new cells are daughter cells

Explanation:

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.