Remember, "skeletons" include bone, the protein shell of crabs or insects, the sturdy ... This mineral makes up the bones and teeth of vertebrates and the shells of ... Some organisms make skeletons of large calcite crystals, as in belemnoids and ... organism were compressed and heated, driving off all the volatiles (H, N, O).
Explanation: Expedition means an adventure or it can be as simple as a flight on a plane but either way a journey seems like the right meaning for the word expedition.
