I am present in every cell, yet I am invisible without aid. My structure defines life, but I need a microscope. What am I?
Category: Science · Difficulty: hard
Hint: Consider the command center of a cell.
Answer
A cell's nucleus
Explanation
A cell's nucleus houses genetic material and controls cellular activities, yet it requires a microscope to be seen.
This is a hard science riddle — a tricky one that takes a little thought. The answer is A cell's nucleus.
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