7th Grade Science · Question of the Day

7th Grade Science Question of the Day

A fresh daily question to build accuracy, reinforce recall, and turn practice into a steady habit.
Wednesday, September 9, 2026

What protects the cell, and allows water, oxygen, and carbon dioxide into and out of the cell?

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Question of the Day

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What protects the cell, and allows water, oxygen, and carbon dioxide into and out of the cell?

  1. Nucleus
  2. Cell membrane
  3. Cell wall (correct answer)
  4. Nuclear membrane

Explanation: To answer this question correctly, we need to know the function of the following organelles: The cell membrane controls movement of materials in and out of the cell, and acts as a barrier between the cell and the environment. The cell wall protects the cell, and allows water, oxygen, and carbon dioxide into and out of the cell. The nuclear membrane controls movement in and out of the nucleus. The nucleus controls the cell's activities. Cell wall is the correct answer.