Answer:
the study of the structure, reaction, and composition of different kinds of substances
Explanation:

That child will need around 1,000 calories a day.
Antibodies are produced by specialized white blood cell called B lymphocytes or B cells when an antigen binds to the B cell surface it stimulate the B cell to divid
<h2>When lost fluid is not compensated sufficiently, dehydration can result.</h2>
Dehydration is the loss of water(H2O) from everywhere. It is an unfavorable depletion in the volume of water in the body. It causes severe diarrhea and vomiting to human. It can be cured by drinking plenty of water daily. A person should drink 8 glass of water in a day.