Biology
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?

You are infected by a virus
You need an antiseptic, not an antibiotic
Having waited a day, it is too late to take an antibiotic
You need to be vaccinated instead of taking an antibiotic

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Biology
The kidneys are stimulated to produce renin

When the specific gravity of urine rises above 1.10
By a decrease in the blood pressure
When the peritubular capillaries are dilated
When the pH of the urine decreases

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