The ozone layer sits near the top of Earth's atmosphere and protects us from the sun's harmful ultraviolet rays. But ozone is dangerous when it's closer to ground level. Which statement is true about ground-level ozone? QT.22 A.

It contributes to nutrient pollution.

B.

It directly causes acid rain.

C.

It is the main component of smog

Which of the following accounts for someone who has had regular herpesvirus-mediated cold sore or genital sore flare-ups? a) re-infection by a closely related herpesvirus of a different strainb) re-infection by the same herpesvirus strainc) copies of the herpesvirus genome permanently maintained in host nucleid) copies of the herpesvirus genome permanently maintained in host cell cytoplasm

This is a negative reaction to food that doesn’t involve the immune system

How can we use food appropriately? to prevent food , it is important that you also avoid .