Which of the following could
be comprised of one atom?
a. carbon
b. salt
c. air

Carbon is Carbon so it's just one atom.

Air is mostly O2, N2, H2O and

Salt is NaCl and not one atom ;)

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.