The term includes all of human existence prior to the emergence of writing

Which element provides strength to the exoskeleton of clams and oysters

The process by which volcanoes vent water vapor, carbon dioxide, nitrogen, and other substances is called question 17 options: oxidation glaciation differentiation outgassing

Aperson who has allergies has a compromised immune system because the body’s immune system: attacks its healthy cells. overreacts to an antigen. steals nutrients from healthy cells. responds to mutagens.