3. Microtubules and spindle fibers help pull chromosomes apart during mitosis. During what phase of mitosis to these structures first appear?

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20 points
Prophase
Metaphase
Anaphase
Telophase

1 answer

Microtubules and spindle fibers first appear during Prophase of mitosis. During this phase, the mitotic spindle begins to form, and the chromosomes condense and become visible.