Biology
The main function of the inner bark of a woody plant is to

Transport food from the leaves to the other parts of the plant
Protect the plant from herbivorous animals
Transport minerals and water from the roots to the leaves
Act as a membrane impermeable to water and gas

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

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