Question

how would removing hydroxyapatite from bone matrix affect the physical properties of a bone?
removal of hydroxyapatite would not affect the matrix.
the bone would be more compressible.
the bone would be stronger.
the bone would be more flexible.
the bone would be more brittle.

Explanation:

Hydroxyapatite provides hardness and compressive - strength to bone. Removing it would make the bone less able to resist compression, thus more compressible.

Answer:

The bone would be more compressible.