Which mineral could have been deposited by black smokers on the seafloor? O barium
silicon
O calcium
O iron sulfide

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give

Agene editing technology called crispr-cas9 uses cellular machinery to change the cell's genetic material. how might this technology be useful in treating diseases like cancer?

Everything in the universe originated from a single point. how was it possible for everything in the universe to have occupied a single point in space?