Biology
Amount of blood found in the body of man

9% of total body weight
10% of total body weight
7% total body weight
25% of total body weight

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

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

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