Textbook Question
In the light micrograph below of dividing cells near the tip of an onion root, identify a cell in interphase, prophase, metaphase, anaphase, and telophase. Describe the major events occurring at each stage.
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11. Cell Division
Phases of Mitosis
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Which of these phases includes all of the stages of mitosis but no other events?
A
G1 phase
B
S phase
C
Interphase
D
M phase
Verified step by step guidance1
Understand the cell cycle: The cell cycle consists of several phases, including G1, S, G2, and M phases. Each phase has specific roles in cell growth and division.
Identify the phases of mitosis: Mitosis is a part of the M phase and includes the stages prophase, metaphase, anaphase, and telophase. These stages are responsible for the division of the cell's nucleus.
Differentiate between interphase and M phase: Interphase includes G1, S, and G2 phases, where the cell grows and DNA is replicated, but mitosis does not occur during interphase.
Focus on the M phase: The M phase is distinct from interphase as it specifically includes all the stages of mitosis, where the cell's nucleus divides, followed by cytokinesis, which divides the cytoplasm.
Conclude that the M phase is the correct answer: Since the M phase includes all stages of mitosis and no other events, it is the phase that fits the criteria given in the problem.
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