All you have to do is say what you would do in that situation.
The cell membrane in humans and animals behaves most like the second option. A police officer who allows select people to enter and leave a crime scene. The cell membrane allows particles through to the cell that are vital for the cell to function, while keeping out unwanted substances.
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Answer:
Explanation:
The first one is Full Moon
The second one is New Moon
The third one is Lunar Eclipse
The last one is Solar Eclipse
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