E:
Scientists think the earth is approximately how old?
2 billion years
3 billion years
for 4 12 billion years
612 billion years
Scientists think the earth is approximately how old

halogen, any of the six nonmetallic elements that constitute group 17 (group viia) of the periodic table. the halogen elements are fluorine (f), chlorine (cl), bromine (br), iodine (i), astatine (at), and tennessine (ts).

life would be meaningless without memes

is this a psat question, if so do not cheat try your best.

the endomembrane system i think