Ben Was Looking at Onion Root Tip Cells Under the Microscope

question 49

Multiple Choice

Ben was looking at onion root tip cells under the microscope in biology class. He saw one cell that had two nuclei within it. What stage of the cell cycle was this cell in?

• A) anaphase
• B) interphase
• C) metaphase
• D) prophase
• E) telophase/cytokinesis

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Definitions:

Pacemaker Cells

Cells located in the heart that control the heart rate by generating impulses that travel through the heart, stimulating contractions.

Action Potentials

Electrical impulses that allow neurons to transmit information to other neurons, muscles, or glands.

Plasma Membrane

The biological membrane separating the interior of a cell from its external environment, composed of a phospholipid bilayer.

Muscular Dystrophy

A group of genetic diseases characterized by progressive weakness and degeneration of the skeletal muscles that control movement.