Answer:
Water has equal H+ and OH- ions, making its pH 7, which is considered a neutral pH.
THERE ALL GREEEN INSIDEEEEEEEEE
Answer:
They speed up chemical reactions. Without them you wouldn't be alive. They break down macromolecules, and also lower the amount of energy needed for a chemical reaction to happen.
Animal dander would be the answer you're looking for.
Hope this helps :)
