Which phase of mitosis is a "preparatory" step involving the development of spindle microtubules?

Question

Quizplus · Accepted Answer

Prophase is the phase of mitosis where chromatin condenses into visible chromosomes and the spindle apparatus begins to form, with the development of spindle microtubules. It is considered the "preparatory" step because it sets the stage for the rest of mitosis to occur. Anaphase involves the separation of sister chromatids, metaphase involves the alignment of chromosomes at the metaphase plate, and telophase involves the formation of two daughter nuclei.

Which Phase of Mitosis Is a "Preparatory" Step Involving the Development