A Diamond Is the Hardest Mineral on Earth, Yet It

question 44

Multiple Choice

A diamond is the hardest mineral on Earth, yet it is mostly empty space because the carbon atoms are

• A) not as close together as they should be.
• B) held together by electrical forces.
• C) themselves mostly empty space.
• D) in perpetual motion.

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Definitions:

Cytoskeleton

Internal framework of the cell, consisting of microtubules, actin filaments, and intermediate filaments.

Organelles

Specialized structures within a cell that perform specific functions necessary for the cell's life, such as mitochondria and chloroplasts.

Chloroplasts

Organelles found in plant and algal cells that conduct photosynthesis, converting light energy into sugar.

Actin Filaments

Protein fibers that play a critical role in cell movement and shape, and are a major component of the cell's cytoskeleton.