In binary fission when cell reproduction into blank, 3 , 4,2,1

In binary fission, a cell divides into two identical daughter cells. So the correct option is "2."

In binary fission, a single cell divides into two identical daughter cells. Therefore, the correct answer is "2".

In binary fission, a cell reproduces by dividing into two identical daughter cells. This process occurs in several steps. Let me explain how to calculate the number of cells produced after a certain number of divisions.

In the first division, one cell divides into two cells. So, if we start with one cell, after the first division, we have two cells.

In the second division, each of the two cells divides into two, resulting in a total of four cells. So, after the second division, we have four cells.

In the third division, each of the four cells divides into two, resulting in a total of eight cells. So, after the third division, we have eight cells.

Therefore, the pattern is that the number of cells doubles with each division. To calculate the number of cells after a certain number of divisions, we can use the formula:

Number of cells = 2^(number of divisions)

For example, for 1 division, the number of cells is 2^1 = 2.
For 2 divisions, the number of cells is 2^2 = 4.
For 3 divisions, the number of cells is 2^3 = 8.

So, for 3 divisions, the answer is 8.