During which geological period did reptiles first appear?
Mesozoic era, Triassic period
Precambrian era, Devonian period
Cenozoic era, Tertiary period
Paleozoic era, Mississippian period

lifetime activities are certain actions that are either required throughout your life or you choose to do them. for example, eating is considered a lifetime activity, drinking water or other beverages, keeping your body clean, taking medicine. those types of actions are considered lifetime activities.