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Please falsify each wrong answer and explain why they are not the correct answer And please...

Please falsify each wrong answer and explain why they are not the correct answer

And please explain why the right answer is correct in detail. Thank you

The nuclear envelope breaks down during mitosis because

A. the mitotic spindle has formed

B. the chromosomes have condensed

C. specific nuclear proteins have become phosphorylated

D. the sister chromatids have separated

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Answer #1

A." mitotic spindle has formed" is the most appropriate answer.

Mitotic spindle originates from the centrosomes and extends to the chromosomes. Centrosomes are present outside the nucleus, thus the disappearance of nuclear membrane favors this process.

B. Doesn't make any impact.

C. Option is not giving any clarity.

D. Doesn't make any impact.

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