7 points The respiratory system is made up of the airways, lungs, and respiratory
muscles. The lungs are classified as -
a cell.
an organism.
an organ.
an organ system.

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%

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

Which of the following best supports the concept that genetic information is passed on to offspring from both of their parents, not just one?