<span>the way a mineral cleaves reveals its crystal structure. true.
</span>
<span>By definition, a mineral must have a crystal structure.</span>
DNA replication<span> is </span>semi-conservative<span> because each helix that is created contains one strand from the helix from which it was copied. </span>
The answer is, D. Organ system
Magnets attracts or repel iron nails