(D)an atom can join with other kinds of atoms.
Basically he explained what a molecule is.
I believe the answer is <span>c. absorption
</span>The phase of pharmacokinetic that happens in the intestine is when the drug absorbed. A person with old age will have lower intestine motility. This will increase the transit time which will increase the amount of drug absorbed.
Age could also influence others pharmacokinetic parameter(<span>excretion, distribution, metabolism) but it is related with another organ, not intestine.</span>
I am not sure but I am guessing carbon and nitrogen :)
So the entire plant and all of its cells receive water
