Gravitational energy

is a type of potential energy
is the energy of an object's position
is stored energy
all of the above

You arrive late to a biological seminar. however, just as you enter the room, you hear the speaker referring to the "five-prime end" and the "three-prime end" of a macromolecule. immediately, you know that they are talking about a: ]

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

Acommon kind of mechanical weathering is called