The crystals of a mineral are always the same size.

False! Nothing is ever honestly the same size of one another, especially not crystals. They're all different, like snowflakes.

In some developing nations the percentage of the animal protein from fish in the diet can be as high as 25 percent.  about 85% of fish caught is used for human consumption.  the remainder is converted into fishmeal and fish oil. 

Bees shall never produce milk no matter what but this is a joke and the answer is a breast that produces milk.