Minerals do NOT A. have unique crystal structures.
B. have definite chemical compositions.
C. form as the result of natural processes.
D. form as the result of compaction and cementation.

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added