The answer is the fourth one.
Protons are fixed in the nucleus
That is an ATP molecule if I remember correctly
D. Things that are kept constant.
Controls are used in an experiment where some variable is being changed. By only changing one thing and keeping the others constant they can make sure that any change in the results is caused by the variable and not the constant, since the constant didn’t change.
The crust must have continental (granitic) plate and oceanic (basaltic) plate to cause both explosive (granitic magma) and non-explosive (basaltic magma) eruptions.
<span>vertebral column comprised mostly of cartillage.</span>