The first organisms to appear on Earth did not need? a.
oxygen.
c.
cells.
b.
nitrogen.
d.
chemicals.
PLZ HURRY
I already know that the answer is NOT D.

You may expect bonds between two atoms which each have n covalent lonic metallic hydrogen

Which piece of equipment would me most useful for measuring the volume of some water? a. pan balance b. graduated cylinder c. tweezers d. flask quick

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax