If one bacterial cell divides every 20 minutes, then how many bacteria will be formed from the bacteria in two hours?
If one bacterial cell divides every 20 minutes, it will divide six times in two hours (120 minutes). Since each division doubles the number of bacteria, the original cell will result in 2 power 6 = 64 bacteria. Therefore, the answer is 64.
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If one bacterial cell divides every 20 minutes, then in two hours (which is equal to 120 minutes), it will divide a total of six times. This is calculated by dividing the total time (120 minutes) by the time it takes for one division (20 minutes): 120 / 20 = 6 divisions.
Each division doubles the number of bacteria. Starting with one bacterial cell, the first division produces two cells, the second division produces four cells, the third division produces eight cells, the fourth division produces sixteen cells, the fifth division produces thirty-two cells, and the sixth division produces sixty-four cells.
Therefore, in two hours, one bacterial cell will form 64 bacteria. The correct answer is [D] 64.