Which of the following events would be controlled by an external signal? A) Cell division. B) Prophase proceeds into metaphase. C) The chromosomes align at the equatorial plane before the cell begins anaphase. D) All of the DNA is copied before the cell enters into the G₂ phase. E) All of these are controlled by an external signal.

Question

Quizplus · Accepted Answer

External signals tell the cell whether or not to divide. Cell division is the only one that would be regulated by external signals. Internal signals ensure that the stages follow one another in the normal sequence and that each stage is properly completed before the next stage begins.

Which of the Following Events Would Be Controlled by an External