Your answer would be <em><u>D. refrigerator coils keeping the refrigerator cold</u></em>
Sadly,I only know the answer to # 1.U,Me,and ur friends (or the animals trying to keep their family safe) and we/they are protecting the forest,we can't breath with out trees after all!
I believe it is the second option
Eukaryota and most likely produces milk to feed its young
Enzymes can be denatured by irregular PH. Meaning that they can change shape. Enzymes rely on their shape in order to function so if their shapes change because of the PH then the active sites don't fit anymore and they enzymes wont work.
RNA. RNA is ribonucleic acid.
