4. Smokers contract significantly fewer colds and flu viruses than nonsmokers. True or False​

The lower respiratory system includes the a. lungs. b. esophogus. c. larynx. d. pharynx

Sometimes without even knowing it, people waste fresh water. write an editorial for our school newspaper. try to convince your readers that saving and recycling water should be something they do every day.

What is the most common blood type in the u.s.?