Answer:
A switch is used to make a circuit ON and OFF.
A holder is used with a lamp
Explanation:
Answer:
A patient who can produce antibodies against some bacterial pathogens, but not against viral infections, probably has a disorder in his, B cells.
a) B cells
Well, 1,300 people die from tobacco smoking in a day. But it's 1 out of 5 deaths.
Answer:
The answer is B. Vitamin A
