Biology
Which of the following is a work done by the placenta tissue in humans?

Support the embryo
Provide nutrition to the embryo
Removes waste matter from the embryo and provide nutrition to the embryo
Remove waste matter from the embryo

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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
Having waited a day, it is too late to take an antibiotic
You need to be vaccinated instead of taking an antibiotic
You are infected by a virus

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