What is the term for a reaction in which a substance gains electrons

What have we learned from fossil evidence about evolution? a) it is an abrupt change. b)the process is observable. c) it takes place during one lifetime only. d)the most complex traits are always selected.

Which best describes carbon dioxide’s path out of the body

Which statement is a physical property? becomes moldy quicklyeasy to digestconducts electricity poorlydoes not burn