I've had my cat for three years. In that time she's gained half a pound. Explain the origin of her increased mass and whether atoms are still the same atoms as when she consumed them.

Why should the united state be concerned about air pollution in china?

If you have a difficult time knowing where your hand is without looking at it you may be having a problem with your what ?

Most crimes involve some evidence relating to the human body; for that reason, what related science is frequently used in forensic investigations? a)psychiatry b)physics c)botany d)biology