Help PLL? :)
Which lens do you first use when looking through the microscope?

Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%

What does the cell nucleus do or, how does it function?

How can one make a supersaturated solution? (apex)