One day you wake with a sore throat and a runny nose. Your doctor takes a swab from your throat, sends it to a lab, and telephones you the next day to say that antibiotic will not help you get better. Which of the following is the most likely reason for the doctor's statement?

A. Potassium chloride B. Potassium carbonate C. Potassium hydroxide D. Sodium bicarbonate

A. hole in ozone layer B. decrease in the ozone layer in troposphere C. decrease in thickness of ozone layer in stratosphere D. increase in the thickness of ozone layer in troposphere

A. angiosperms B. gymnosperms C. monocotyledons D. dicotyledons

A. transfer of pollen from anther to stigma B. germination of pollen grains C. growth of pollen tube in ovule D. visiting flowers by insects