Explain how fossils provide evidence of organisms on earth?

Ascientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide, oxygen, and nitrogen. which term most likely describes what she is measuring?

How many moles of potassium are needed to react completely with 12.8 moles of magnessium bromide?

Scientist think that animals with remarkably similar embryo development probably shared a common ancestor