(this is earth science) light reflects evenly off a galena crystal, giving its surface a mirror like appearance.
1.Cleavage
2.luster
3.shape
4.hardness
5.streak
6. transparency
which one is it?

The light reflects on the crystal evenly causing Transparency

Resistance than a bicycle? i'm not entirely sure

When a virus infects a host cell, it uses the cell's machinery to make copies of its own genetic material in a process called replication. finally, during the process of self-assembly, that protein shell and the copies of the virus's genetic material are assembled into new viruses.