A: According to BBC, an endoskeleton is a bone structure located in the interior of an animal, and an exoskeleton is a bone structure located on the exterior of an animal. Each type of skeleton has unique advantages and disadvantages in helping the animal survive.
Minerals made of only one element are called NATIVE minerals (i.e., silver, gold, mercury, copper). Minerals composed of compounds are simply referred to as minerals (i.e., quartz, which is made up on silicon and oxygen).
A rock is composed of combinations of minerals, each mineral having its own chemical formula and crystalline structure.Minerals are composed of an element or combination of elements. rock is combinations of minerals and either has to be an igneous, metamorphic, or sedimentary rock. A mineral is a solid that was formed in nature, has a definite chemical â¦ makeup, and has a crystal structure.